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Antique & Vintage
Slide Rules & Calculators

Past Sales Archive

This is just a sample of the many K & E Slide Rules we have sold.
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K & E / Keuffel & Esser 4013 Thacher Slide Rule / CalculatorK & E / Keuffel & Esser 4013 Thacher Slide Rule / Calculator This #4013 Thatcher calculator / slide rule is very nice. The serial # is 4071 and this # can be found on both the mahogany mounting board near the top back edge along with the eagle logo and K & E name and on the label inside the top lid.  The K & E 4013 calculator / slide rule is the upgraded and rarer model of this style calculator / circular drum slide rule that came equipped with an auxiliary magnifier to help the user read the scales.

The overall condition of both the 4013 rule and the box are very nice.  The scales on the inner drum are nice with a few minor rubs and have a nice even patina. The outer scales are great and have been pictured.  There is little or no spotting and rust except at the very ends of the scales. The instructions on the base are good.  The triangular bar or rod for the magnifier and the bracket are original.  The magnifier itself is a replacement that is very close in appearance to an original from this time period.   The mahogany box is very nice with just a few minor scratches.  There are no names, initials, or other carved into the box, base, or calculator.

Edwin Thacher first patented the idea for this slide rule / calculator in 1881 in England.  The Thacher calculator has a  near unique sliding drum design whose scales total over 30' long if laid out in a line.  The idea was an immediate success with the scientific and engineering communities. K & E bought the rights to produce them.  Stanley initially produced them in England.  K & E moved production to the states near the turn of the century. The Thatcher calculator was first offered by K & E in their 1887 catalog as the 1740-N.  In 1890 they dropped the N.  In 1899 they changed the calculators # to 4012 or 4013.  I believe this Thacher dates from shortly after the turn of the century  There were approx. 7000 total made with very few being the upgraded 4013 w/ magnifier like this.  They are far rarer than the 4012.   The inventors name is Thacher, but it was misspelled Thatcher on almost all versions of the calculator that K & E offered, hence the use of two different spellings of Thatcher / Thacher in this ad and on the rule itself. 

A super piece that will display well and be a great addition to the collection!!  Enjoy.

Fine . . . . . $1750.00    SOLD!!





K & E / Keuffel & Esser # 1740 (4012) Type I  Thacher Slide Rule / CalculatorK & E / Keuffel & Esser # 1740 (4012) Type I  Thacher Slide Rule / Calculator  This Type I Keuffel & Esser / Thacher  # 1740 calculator / slide rule is a very early and one of the finest condition Thatcher calculators I have ever had the pleasure to offer.  The serial # is 466. 

Edwin Thacher first patented the idea for this slide rule / calculator in 1881 in England.  The Thacher calculator has a  near unique sliding drum design whose scales total over 30' long. if laid out in a line.  The idea was an immediate success with the scientific and engineering communities.  K & E bought the rights to produce them, and initially Stanley of England produced them in England before K & E moved production to the states near the turn of the century. 

The Thatcher calculator was first offered by K & E in their 1887 catalog as the 1740-N.  3 years later in 1890 they dropped the N in catalog listings.  In 1899 they changed the calculators # to 4012. The only place this example is marked is a small tag on the base with the serial #.  The board is not marked, nor is the original box and there is no indication it ever was.   The model number is not called off, and given how early this example is the proper call out might be 1740-N.

The overall condition of this unusual slide rule is exceptional.  There is virtually no spotting or yellowing except at the very end as one would expect and is the norm.  The inner scales on the drum are very nice, a mellow white, with no damage or lifting of the paper scales.  Note from the end shot the condition of the felt pads on the insides of the drum.  They are like new!!  The instructions on the base are as nice as one could ask for.  The mahogany box is very nice with most of its original finish and just a few minor scratches.  There are no owner names or initials carved into the box, base, or calculator.  I can not over state the condition of this rule.  It is about as nicet as you can get or will ever see.

The inventors name is really Thacher, but it was misspelled Thatcher on almost all versions of this calculator that K & E offered, hence the use of two different spellings of Thatcher / Thacher in this ad.

A super piece that will display well and be a great addition to the collection!!  Enjoy.

Fine. . . . . $1795.00        SOLD!!



K & E / Keuffel & Esser 4012 Thacher Slide Rule / CalculatorK & E / Keuffel & Esser 4012 Thacher Slide Rule / Calculator This #4012 Thatcher calculator / slide rule is in good condition and will display nicely.  The serial # is 5074 and this # can be found on both the mahogany mounting board near the top back edge along with the eagle logo and K & E name, and on the paper label inside the top lid. 

The inner scales on the drum are nice with a few minor rubs and have a nice even patina.  There has been some lifting of the outer scales.  Some of the loose areas were taped at some earlier point and that discolored a few areas. The worst areas have been pictured.  (see pics)   There is little spotting or rust coming through, it is just that the scales lifted. As can be seen in the pics, the instructions on the base are very nice.   The mahogany box is very nice with just a few minor scratches and paint splatters.  There are no names, initials, or other carved into the box, base, or calculator.

Edwin Thacher first patented the idea for this slide rule / calculator in 1881 in England.  The Thacher calculator has a  near unique sliding drum design whose scales total over 30' long if laid out in a line.  The idea was an immediate success with the scientific and engineering communities. K & E bought the rights to produce them.  Stanley initially produced them in England  for K & E.  K & E moved production to the states near the turn of the century. The Thatcher calculator was first offered by K & E in their 1887 catalog as the 1740-N.  In 1890 they dropped the N.  In 1899 they changed the calculators # to 4012 or 4013. There were approx. 7000 total made   The inventors name is Thacher, but it was misspelled Thatcher on almost all versions of the calculator that K & E offered, hence the use of two different spellings of Thatcher / Thacher in this ad and on the rule itself. 

A nice piece that will display well and be a great addition to the collection!!  Enjoy.

Good . . . . . $700.00    SOLD!!



 & E / Keuffel & Esser 4012 Thacher / Thatcher Slide Rule / CalculatorK & E / Keuffel & Esser 4012 Thacher / Thatcher Slide Rule / Calculator This #4012 Thatcher calculator / slide rule is in very nice overall condition. The serial # is 4133 and this # can be found on both the mahogany board the calculator is mounted on near the top back edge, along with the eagle logo and K & E name, and on the label inside the top lid.  Laid out its scales would measure over 30' long.  It was the calculator of choice in its day and is an important part of calculator history. 

The scales on the inner drum have a nice even patina.  There is one small area with light stains.   The outer scales are nice as well.  There is little or no spotting and rust. The instructions on the base have some losses.  The original instruction manual is present and in fine condition.  These rules are almost never found with the original instruction manual.   The mahogany box is very nice with just a few minor scratches.  There are no names, initials, or other carved into the box, base, or calculator.

Edwin Thacher first patented the idea for this slide rule / calculator in 1881 in England.  The Thacher calculator has a  near unique sliding drum design whose scales total over 30' long if laid out in a line.  The idea was an immediate success with the scientific and engineering communities. K & E bought the rights to produce them.  Stanley initially produced them in England.  K & E moved production to the states near the turn of the century. The Thatcher calculator was first offered by K & E in their 1887 catalog as the 1740-N.  In 1890 they dropped the N.  In 1899 they changed the calculators # to 4012 or 4013.  I believe this Thacher dates from the teens as that is what the manual is dated.  There were approx. 7000 total made. The inventors name is Thacher, but it was misspelled Thatcher on almost all versions of the calculator that K & E offered, hence the use of two different spellings of Thatcher / Thacher in this ad and on the rule itself. 

A super piece that will display well and be a great addition to the collection!!  Enjoy.

Good + . . . . . $675.00       SOLD!!



4012 Thatcher Calculator by 
        Keuffel & Esser# 4012 Thatcher Calculator by Keuffel & Esser  The Thatcher calculator is one of the best known and most sought after of all calculating devices that was ever produced or offered.  First introduced in England in the 1880's it was developed and designed by a fellow named Edwin Thacher, ( Keuffel & Esser did him the disservice of misspelling his# 4012 Thatcher Calculator by 
        Keuffel & Esser name on subsequent calculators they offered by adding a T making for Thatcher appearing on the calculators).  First patented in the US in 1881,  production and manufacture was originally carried out in England but was moved to the US shortly after K & E bought out the rights to manufacture the rule.  There were two basic models available the 4012 and the 4013  which was basically the same rule with the addition of a magnifier which ran on a bar in front of the scales.

The condition of this early example is stunning.  The paper scales which are often damaged, or yellowed and peeling or flaking from rust under them are near flawless in this example. The previous owner has circled a few numbers in ink on the internal scales to facilitate a repeated calculation he must have been making, but this is minor and insignificant to the overall importance of this rule.  The instructions are complete and legible as well.

Good . . . . . $1250.00         SOLD



The New York Automatic Lightning Calculator /Automatic Arithmeticer by John Schmidt & Co.
AKA K&E #1704 Thatcher Slide Rule CalculatorThe New York Automatic Lightning Calculator /Automatic Arithmeticer by John Schmidt & Co.
AKA K&E / Keuffel & Esser #1704 / Thatcher Patent Slide Rule / Calculator Serial # 704  
This is a very rare calculator / slide rule and before this one turned up was an unheard of and never before seen variation of a Type 1 Keuffel & Esser Thacher Patent Slide Rule / Calculator.

Numerous Google searches turned up no reference to John Schmidt & Co or any reference to The New York Automatic Lightning Calculator this is slide rule is referred to as on the label in the top of the box.  Searches for the second name "Automatic Arithmeticer" as the applied labels on the end of the drum refer to it as, produced nothing either.   I found no reference to Thacher Patent calculators / slide rules ever being offered by anyone other than K & E.The New York Automatic Lightning Calculator /Automatic Arithmeticer by John Schmidt & Co.  This is a true oddity, and rarity in the slide rule collecting field. 

Edwin Thatcher first patented his idea for this design slide rule in England in 1881.  The design and idea were an immediate success with the scientific and engineering communities there and abroad.  K & E bought the rights to produce them, and initially Stanley of England produced them in England before K & E moved production to the states near the turn of the century.  From research I did on the internet Thacher Calculators are "typed" into three periods.  Type 1 Thacher slide rules were produced from 1881 to 1899 and had certain characteristics that  differentiated them from the later to come models.  This ones features match those of an early Type 1 instrument.  The serial # on this instruments box is 704.   Most early Type 1 Thacher calculators were marked with the serial number on a small plaque attached to the front right corner.  That plaque would also give the name Keuffel & Esser, and the serial #.  That plaque is missing on this instrument, but the nail holes are there.

It appears that this slide rule began life as a Thacher calculator and that it has been modified.  There is a large label attached to the box lid that claims there is a patent pending.  It also has a Masonic symbol, and a bunch of text attesting to what a wonderful calculating device it is.  It has also been modified with the addition of paper labels attached to the ends of the inner drum.  Those labels give it different name not on the label in the lid.  The label also claims John Schmidt was the manufacturer and that a patent was pending.

There is little to no doubt this was / is a Keuffel & Esser Thacher before it was modified.  You can see where the Thacher name was taken off of the instructions on the left side above the word Calculating Instrument.  A bit unceremoniously being just scraped off..  On the right front, where the small K & E tag with serial # would be there are just 2 empty holes for the small nails.  The other place that Thatcher rules were identified, was on the end of the inner drum, and they have been covered with new different paper labels with new information and names hiding the original K & E And Thatcher info typically found there.

The overall condition of the rule itself is good with no major chips or damage to the scales to speak of.  There are small patches of brown spots on the outer scales as is typically found, but it is not bad..  The inner paper scales have some bubbles or minor lifting in them, but overall are nice, and stable.   Most of the scales are a light mellow tan / yellow that is normal.  The instructions on the base are in very nice condition.  The mahogany box is OK noting the crack along the bottom, and one in the back right corner.  There are no names carved into the box or base of the calculator itself..

Many questions remain.  Who? When? Why? Others / More? and more.  A series mysteries waiting to be solved through further research.   But bottom line, a  nice example of a rare and interesting calculating slide rule that no one else has. Opportunity knocks but once. 

Good +. . . . . $2450.00        SOLD!!




K & E / Keuffel & Esser Thatcher #4012 Slide Rule / CalculatorK & E / Keuffel & Esser Thatcher #4012 Slide Rule / Calculator  This is a nice but well used Thatcher's calculator / slide rule.  The famous Thacher calculator with its near unique sliding drum design has scales totaling over 30' long. if laid out in a line   The inventors name is really Thacher, but it was mis-spelled on almost all versions that K & E offered, hence the use of two different spellings here. 

Thatcher slide rules were first patented in England in 1881 and were an immediate success with the scientific and engineering communities.  K & E bought the rights to produce them, and initially Stanley of England produced them in England before K & E moved production to the states near the turn of the century. 

The serial # on this instrument is 4252 and the box and instrument have the same number .   The overall condition of the rule itself is good with no chips or damage to the scales to speak of.  There are just a few small patches of brown spots, most no larger than pin heads on the outer scales.  Most of the scales  are a light mellow tan / yellow that is normal.  The inner scales on the drum are very nice as well with no damage or lifting.  The instructions on the base are worn but present.  The mahogany box is OK noting the crack along the bottom front edge.  It has its original finish. There are no names carved into the box or base of the calculator itself..

A nice example of this rare and interesting calculating slide rule priced to sell.

Good . . . . . $795.00       SOLD!!



Keuffel & Esser Thatcher #4012 Slide Rule Calculator in #4013 BoxKeuffel & Esser Thatcher #4012 Slide Rule Calculator in #4013 Box   The king of calculators / slide rules.  The Thatcher was first patented in England in 1881.  K & E bought the rights and at first had them produced by Stanley of England before moving the production here to the states near the turn of the century.  The serial # on the instrument is 4250.  The box which is actually marked for the upscale model #4013, is slightly larger to accommodate the rod and magnifier that came with that model.  It is nice noting the one tight age crack across the top  The serial # on it is #2967.  It seems that at some point in its life this one was put back into the wrong box.  The overall condition of the rule itself is exceptional.  The scales are a light mellow tan, but there is virtually no rust spots or damage to the scales as is often found on these instruments. There are a couple of minor chips near the edges, and  I see one small tear in the scale on one peak, but that is about it.  The inner scales on the drum are very nice.  The instructions on the base are very nice as well.  The base is nice and unlike the last one of these I owned the entire student body did not carve their name into the bottom of this one.  All in all one of the nicest examples of the rare and interesting calculation device I have ever had the pleasure to see.

Good . . . . . $1450.00         SOLD



K & E / Keuffel & Esser Thatcher #4012 Slide Rule / CalculatorK & E / Keuffel & Esser Thatcher #4012 Slide Rule / Calculator     This is a very nice and very early Thatcher's calculator.   Thatcher calculators / slide rules were first patented in England in 1881 and were an immediate success with the scientific and engineering communities.  The Thacher calculator with its near unique sliding drum design has scales totaling over 30' long.  The name is really Thacher, but it was mis-spelled Thatcher on almost all versions. Hence the use of two different spellings.  K & E bought the rights to produce them, and initially Stanley of England produced them in England.  K & E moved production to the states near the turn of the century.

The serial # on this instrument is 1444 making it a relatively early model.  The Thatcher was in production from the late 1800's up till about the mid 20th century. I believe  there were less 8,000 or so made over the years.

Good . . . . . $1250.00         SOLD



K & E / Keuffel & Esser Thatcher #4012 Slide Rule / CalculatorK & E 4012 Thatchers   The overall condition of the rule itself is very nice with no major chips or damage to the scales.  The scales are a light mellow tan / yellow, and there is virtually no rust spotting , browning, or damage to them.   The inner scales on the drum are very nice as well with no damage or lifting.  The instructions on the base are very nice.  The mahogany box  has its original finish. There are no names carved into the box or base of the calculator itself.

Another very nice example of this rare and interesting calculating slide rule.    Highly recommended!!

Good . . . . . $975.00      SOLD



K & E / Keuffel & Esser Thatcher #4012 Slide Rule / Calculator K & E / Keuffel & Esser Thatcher #4012 Slide Rule / Calculator  This is a nice early Thatcher's / Keuffel & Esser #4012 calculator / slide rule. The serial # is 2659.  The Thacher calculator has a  near unique sliding drum design whose scales total over 30' long. if laid out in a line   The inventors name is really Thacher, but it was mis-spelled on almost all versions of this calculator that K & E offered, hence the use of two different spellings here. 

Thatcher slide rules were first patented in England in 1881 and were an immediate success with the scientific and engineering communities.  K & E bought the rights to produce them, and initially Stanley of England produced them in England before K & E moved production to the states near the turn of the century.  This is an earlier version.  Note that the label in the box lid calls this off as a #1740.  That was K & E's catalog designation for this rule in the early days.  

The overall condition of the rule itself is very good with just a few chips at the peaks of the outer scales.  There is very little spotting.  There are just a few small patches of brown spots, most no larger than pin heads on the outer scales.  Most of the scales are a light mellow tan / yellow that is normal.  The inner scales on the drum are very nice as well with no damage or lifting of the paper scales.  The instructions on the base are as nice as one could ask for.  The mahogany box is nice and has most of its original finish.  The label inside is near perfect.  There are no names carved into the box or base of the calculator itself..

A nice example of this rare and interesting calculating slide rule priced to sell.

Good . . . . . $1250.00       SOLD!!




K & E / Keuffel & Esser Type I # 1740 (4012) Thatcher Slide Rule / Calculator K & E / Keuffel & Esser # 1740 (4012) Type I  Thacher Slide Rule / Calculator  This Type I  Keuffel & Esser / Thacher  # 1740 calculator / slide rule is the earliest and finest condition Thatcher calculator I have ever had the pleasure to offer.  The serial # is 633.  The Thatcher calculator was first offered by K & E in their 1887 catalog as the 1740-N.  In 1890 they dropped the N.  In 1899 they changed the calculators # to 4012.  Note how the label in the box lid calls this off as a #1740 / 633.  That was K & E's catalog designation for this rule after 1890 and I would assume means this dates from within a year or so of that date.

Edwin Thacher first patented the idea for this slide rule / calculator in 1881 in England.  The Thacher calculator has a  near unique sliding drum design whose scales total over 30' long. if laid out in a line.  The idea was an immediate success with the scientific and engineering communities.  K & E bought the rights to produce them, and initially Stanley of England produced them in England before K & E moved production to the states near the turn of the century. 

The overall condition of the rule is exceptional.  There is virtually no spotting or yellowing.  The inner scales on the drum are very nice as well with no damage or lifting of the paper scales.  Note from the end shot the condition of the felt pads on the insides of the drum.  They are like new!!  The instructions on the base are as nice as one could ask for.  The mahogany box is very nice and has most of its original finish.  The label with serial # and model number inside is near perfect.  It also has an inspectors tag in the lower corner.  There are no names initials or other carved into the box, base, or calculator.  I can not over state the condition of this rule.  It is as close to mint as you can get or will ever see.

The inventors name is really Thacher, but it was misspelled Thatcher on almost all versions of this calculator that K & E offered, hence the use of two different spellings of Thatcher / Thacher in this ad
 

Excellent . . . . . $1750.00        SOLD!!




K & E / Keuffel & Esser Type I # 1740 (4012) Thatcher Slide Rule / CalculatorK & E / Keuffel & Esser 4013 Thacher Slide Rule / Calculator  The 4013 Thatcher is the same as a 4012 with the addition of a magnifier. Some staining but not bad.  This example has a replaced magnifier, but the rail and brackets are original.

The inventors name is really Thacher, but it was misspelled Thatcher on almost all versions of this calculator that K & E offered, hence the use of two different spellings of Thatcher / Thacher in this ad
 

Excellent . . . . . $1675.00         SOLD!!




K & E / Keuffel & Esser 4012 Thacher Slide Rule / CalculatorK & E / Keuffel & Esser 4012 Thacher Slide Rule / Calculator This #4012 Thacher calculator / slide rule is very nice. The serial # is 1963 and this can be found on the mahogany mounting board near the top.

Edwin Thacher first patented the idea for this slide rule / calculator in 1881 in England.  The Thacher calculator has a  near unique sliding drum design whose scales total over 30' long if laid out in a line.  The idea was an immediate success with the scientific and engineering communities. K & E bought the rights to produce them, and initially Stanley of England produced them in England before K & E moved production to the states near the turn of the century. The Thatcher calculator was first offered by K & E in their 1887 catalog as the 1740-N.  In 1890 they dropped the N.  In 1899 they changed the calculators # to 4012 or 4013.  There were approx 7000 total made with the vast majority being the 4012 model.

The overall condition of the rule is very nice.  The scales have an even patina which is typical  There is little or no rusting, spotting or lifting of the scales. There are no major stains or rust spots coming up through the scales.  There are a couple of minor stains on the inner drum.  The scales are very nice with no damage or lifting of the paper scales.  The instructions on the base are as nice as one could ask for. The mahogany box is very nice and has most of its original finish with just minor scuffs.  There are no names, initials, or other carved into the box, base, or calculator. All in all as nice an example as you are likely to find.

The inventors name of this slide rule is Thacher, but it was misspelled Thatcher on almost all versions of this calculator that K & E offered, hence the use of two different spellings of Thatcher / Thacher in this ad
 

Good + . . . . . $975.00        SOLD!




K & E / Keuffel & Esser 4012 Thacher Slide Rule / CalculatorK & E / Keuffel & Esser 4012 Thacher Slide Rule / Calculator This #4012 Thacher calculator / slide rule is very nice. The serial # is 1678 and this can be found on the mahogany mounting board near the top along with the eagle logo and K & E name. The scales on the inner drum look great and have a nice even patina. I see no stray marks or other issues.  There is literally or no rusting, spotting, or lifting of the scales on the outer scales.  The instructions on the base are as nice as one could ask for.  Check all the pics to see just how nice this rule is.

Edwin Thacher first patented the idea for this slide rule / calculator in 1881 in England.  The Thacher calculator has a  near unique sliding drum design whose scales total over 30' long if laid out in a line.  The idea was an immediate success with the scientific and engineering communities. K & E bought the rights to produce them, and initially Stanley of England produced them in England.  K & E moved production to the states near the turn of the century. The Thatcher calculator was first offered by K & E in their 1887 catalog as the 1740-N.  In 1890 they dropped the N.  In 1899 they changed the calculators # to 4012 or 4013.  I believe this dates from right around that time period.  There were approx 7000 total made.  The inventors name is Thacher, but it was misspelled Thatcher on almost all versions of this calculator that K & E offered, hence the use of two different spellings of Thatcher / Thacher in this ad and on the rule itself. 

The mahogany box is OK with areas of finish loss as can be seen.  There are no names, initials, or other carved into the box, base, or calculator. The box has a lock installed which is a feature I have not seen before.  There is a key, but the lock needs to be fiddled with as it does not seem to want to turn right now.  A super piece that will display well and be a great addition to the collection!!  Enjoy.

Good + . . . . . $1250.00       SOLD!!




Keuffel & Esser 4012 Thacher CalculatorK & E / Keuffel & Esser 4012 Thacher Slide Rule / Calculator This #4012 Thacher calculator / slide rule is very nice.  It has developed a nice even yellowing of the scales w/ little to no lifting or spotting.  The original instructions are included.    Check all the pics to see just how nice this rule is.

Edwin Thacher first patented the idea for this slide rule / calculator in 1881 in England.  The Thacher calculator has a  near unique sliding drum design whose scales total over 30' long if laid out in a line.  The idea was an immediate success with the scientific and engineering communities. K & E bought the rights to produce them, and initially Stanley of England produced them in England.  K & E moved production to the states near the turn of the century. The Thatcher calculator was first offered by K & E in their 1887 catalog as the 1740-N.  In 1890 they dropped the N.  In 1899 they changed the calculators # to 4012 or 4013.  I believe this dates from right around that time period.  There were approx 7000 total made.  The inventors name is Thacher, but it was misspelled Thatcher on almost all versions of this calculator that K & E offered, hence the use of two different spellings of Thatcher / Thacher in this ad and on the rule itself. 

The mahogany box is OK with areas of finish loss as can be seen.  There are no names, initials, or other carved into the box, base, or calculator.  A super piece that will display well and be a great addition to the collection!!  Enjoy.

Good + . . . . . $675.00       SOLD!!




K & E / Keuffel & Esser 4018 Pocket Slide Rule / CalculatorK & E / Keuffel & Esser 4018 Pocket Slide Rule / Calculator  This is for the pocket watch style calculator / slide rule on the left in the picture.  The Sperry patent on the right has sold.  Keuffel & Esser / K & E offered this style pocket watch type slide rule / calculator back near the turn of the century and even though it is marked Pat Appl'd for is very similar in look, style, and design to the Sperry 4017 listed above. It is thought that K & E offered these to avoid the payment of royalties to Sperry for the 4017 they sold during the same time period.   It is in super nice condition and fully operational.   It is equally hard to find and not very many were made or survived.  Opportunity!!

Fine . . . . . $695.00       SOLD!!



K & E / Keuffel & Esser 68-1215 Slide RuleK & E / Keuffel & Esser 68-1215 Slide Rule   This is a very nice, and very hard to find rule by K & E.  In its original box with case and instructions.  It displays no signs of use.  Very Unusual and very nice!!

Fine . . . . $150.00         SOLD!






K & E Slide Rule#4061 T 5" Duplex Slide Rule w/ Trig Scales and Clamshell Cursor   This is a very rare sliderule that K & E only produced for a few short years back near the turn of the century.  It has the second model cursor K & E produced or experimented with known as the clamshell model. Keuffel and Esser used this design for a very short period before offering the columned cursor and then the frameless cursor before they settled in to the typical design framed cursor that most rules are found with.

The condition of this example is super.  There is no serial # and it has 2 patent dates from 1905 and 1908 on the bottom rail in red.  The leather case is missing its flap and the previous owner did write his name on it, but this is not a detraction or problem as the overall condition and rarity of the rule itself are the important aspects here.  Super!!!

Good . . . . . $975.00         SOLD



K & E / Keuffel & Esser 4133
          Roylance Electrical Slide Rule w/ Magnifier & Humped CaseK & E / Keuffel & Esser <N4133> Roylance Electrical Slide Rule w/ Magnifier & Humped Case The Roylance 4133 is a hard to find slide rule developed specifically for electrical related calculations.  It has special scales to help determine the load capacity for different lengths of different size wire.   K & E introduced this 8" rule in 1915.  The serial # is 415938 and dates from the 1930's.

This is an unusual variant with a fitted magnifier and its original nice condition humped leather case to allow for that.  The overall condition of the rule itself is nice.   There is some light tarnish on the magnifier brackets, and the plastic cursor bars have cracks in them but are stable.  The 2 line cursor glass and the metal frame are OK.

Good + . . . . . $45.00




K & E / Keuffel & Esser 68-1100 Deci-lon  Slide RuleK & E / Keuffel & Esser 68-1100 Deci-lon Slide Rule This is a nice looking sliderule.  The leather case is fine and one of the last style / models offered. 

Fine . . . . . $125.00        SOLD!!  




K & E Webb Stadia Rule / Circular SlideruleThe #4105 Webb Stadia Rule  The Webb Stadia rule is a great design, and was meant for field use this explaining the relatively few that have survived.  It is approx 1 1/2 dia. and the inner slide rule is protected by the outer tole painted and decorated hard cover.  Keuffel & Esser's description in their catalog describes this design as being equal to a straight slide rule that was 4 1/2' long that has been compacted into a 1 1/2" cylinder that is only 15" long.   It is interesting to note that at the time it only cost .50 more than the hard to find, but much more common #4100 slide rule which was also used for Stadia or survey related work.  It is a wealth of information when looking for obscure and old items that are not found in later catalogs. 

The condition of this early example is stunning.  The paper scales which are often damaged, or yellowed and peeling or flaking from rust under them are nice in this example, noting some rubs and wear.  The instructions on the tube are complete and legible as well..  This is a rare and unusual opportunity to own one of these desirable calculators.

Good . . . . . $1450.00         SOLD



The Sperry Patent Pocket Calculator #4017 by Keuffel & Esser
The Sperry Patent Pocket Calculator #4017 by Keuffel & Esser    There are many different watch style calculators available, but the Sperry which was offered by K & E is one of the hardest of all to find.  The cost in 1913 was 15.00, a considerable sum in those days, and an amount that was sure to dissuade all but the most eager or serious.  The write up and description in the early K & E catalogs for these calculators is great with a style and text that was sure to impress the prospective buyer who felt it was time to trade in the old slip-stick, but that $15.00 price tag must have been a major obstacle as few are available today.

Good . . . . . $795.00         SOLD




Keuffel & Esser's Speery Calculator / Slide Rule The Sperry Patent Pocket Calculator #4017 by Keuffel & Esser    K & E offered this, the Sperry, and the 4018 which they copied and offered after the Sperry patent ran out.  It is a far harder to find calculator.

Good . . . . . $795.00          SOLD







Keuffel & Esser 4095 Merchants Slide RuleKeuffel & Esser 4095 Merchants Slide Rule   This style rule has only 4 scales for the limited figuring required to run math calcs for a business.  It is a frameless cursor era in the case and remains of the box.

Good . . . . . $75.00          SOLD





K & E  68-1749 (4096) Desk Top Slide Rule K & E 68-1749  (4096) 20" Desk Top Slide Rule w/ Hard Case  The 68-1749 desk top slide rule was offered for use in offices or most any desktop, and was equipped with feet to hold it on an angle in front of the user.  Prior to 1962 it was numbered (4096).  K & E also offered this rule without the hard case and cast iron feet. This variant in the hard case is found much less often than the typical model and they were made for only a few years after the model change to 68-1749 and when K & E finally got out of the slide rule making business after the introduction of electronic hand- held's. 

This particular rule is factory engraved with the name Elton W. Reither.  Elton was the area manager for K & E  in Puerto Rico and the Caribbean during this time period and this was a presentation slide rule given to him either upon promotion or retirement.  This rule was consigned here by his family and has been with them since that time. 

The condition is like new.  There is no damage to the rule or box.  Note the condition of the finish on the mahogany in the views from the back.  The paper conversion chart there is flawless as well.  The pads on the cast iron feet show no wear either.  A super piece of calculation history in super condition. 

Good+  . . . . . $295.00          SOLD!



Keuffel & Esser 4053-5 20 Slide Rule w/ Leather Case Box & BookKeuffel & Esser 4053-5 20" Slide Rule w/ Leather Case Box & Book  The condition of this 20" K & E Sliderule is very nice.  It is still in its original plastic sleeve.   There is no damage to the rule, cursor, or green leather case. 

Fine . . . . . $165.00                    SOLD!!





K & E 4095 Merchants Slide RuleK & E 4095 Merchants Slide Rule This is a nice looking sliderule.  It was designed for use by storekeepers, and they used the KISS theory putting just 6 scales on the rule.  It is an early model with a double sided frameless cursor that is undamaged.  That in itself is a rarity.   The other interesting fact is the original owners name was TOLL.

Good + . . . . . $75.00        SOLD!




K & E Deci-Lon Slide RuleK & E Deci-Lon Slide Rule    The rule and  the exterior of the case are in super condition. 

Good . . . . . $75.00         SOLD






K & E 4070-3 Slide RuleK & E 4070-3 Slide Rule This is a nice looking sliderule. 

Good + . . . . . $35.00     SOLD!





K & E #1210 Log Log Duplex Slide RuleK & E #68 - 1210 Log Log Duplex Slide Rule  This K & E rule is from near the end of the production period for slide rules. The world was going electronic, and K & E changing its model #'s was not going to help.  The rule is a #1210, the box says it is for a 1220 and the manual for another rule.  I believe it is all correct and that K & E was just moving product out.   The case is fine and marked w/ the previous owners name inside the flap.  The outer box has issues.

Good+  . . . . . $65.00        SOLD!





K & E / Keuffel & Esser 4045 16 Inch Slide RuleK & E / Keuffel & Esser 4045 16 Inch Slide Rule   16" rules are very hard to find.  The box is tattered, the rule is nice!!

Good +. . . . . $75.00           SOLD!!





K & E / Keuffel & Esser 4053-3 Slide RuleK & E / Keuffel & Esser 4053-3S Slide Rule   In the box and with the sewn case. It is a later model with half plastic / half laminate covered wood, from near the end of production.   Nice!!

Good + . . . . . $35.00        SOLD!!






K & E / Keuffel & Esser 4088-2SM Slide RuleK & E / Keuffel & Esser 4088-2 SM Slide Rule   Although 4088 rules are pretty common, it is pretty rare to find one this nice w/ the bells and whistles this one has.  The S designates the sewn case and M the hard to find magnifier.     Very Unusual and very nice!!.

Fine . . . . . $95.00        SOLD!




K & E # 4100 Stadia RuleK & E / Keuffel & Esser # 4100 Stadia Rule w/ Magnifier & Hump Leather Case & Box   This is a nice looking K & E 4100 Stadia sliderule designed for use in the field or office of surveyors and engineers.  The scales are set specifically for surveying and working with angles and elevations.  There are instructions on the back side.    It is a rare combination with the magnifier, case and box  The green box is unmarked but a proper K  & E product.  The condition of the rule and case are like new.     

Fine  . . . . . $145.00        SOLD!



K & E / Keuffel & Esser 4168 6 Slide RuleK & E / Keuffel & Esser 4168 6" Slide Rule w/ Case 7 Box    As new!!  Nice!!

Good + . . . .  $55.00        SOLD!!




2 K & E / Keuffel & Esser 4181 Slide Rules2 K & E / Keuffel & Esser 4181 Slide Rules   Although different sizes both of these 6" rules are marked 4181.  You get the box and book in the last pic as well, so you get 2 rules and 2 boxes for one money.   Very Unusual and very nice!!.

Fine . . . . . $95.00        SOLD!




K & E / Keuffel & Esser 4100 Stadia Slide RuleK & E / Keuffel & Esser 4100 Stadia Slide Rule   This is a very nice, and very hard to find stadia or surveyors rule by K & E.  Stadia rules were used by surveyors or engineers to figure elevations and distances in the field.  Very Unusual and very nice!!.

Good + . . . . . $125.00      SOLD!!



K & E / Keuffel & Esser 4133 Elecrtical Slide RuleK & E / Keuffel & Esser 4133 RoyLance Electrical Slide Rule   This is geared toward electrical calculations and is a hard to find 8" rule.  The frameless cursor would date it from just after the turn of the century.  Very Unusual and Very Nice!!

Fine . . . . . $85.00        SOLD!!



Locke Adder / CalculatorK & E 4100 Stadia Rule  Nice.

Fine . . . . . $150.00         SOLD





Keuffel & Esser / K & E Reymond Patent Leather Calculating Slide RuleM. H. Reymond  Patented 1924 Leather Calculating Slide Rule   This is a rare slide rule.  I have had one other in over 20 years of buying and selling sliderules.  I have only seen 2 others sell in all that time.  The one I had, like this one, came from New England which was the center of Americas' shoe making industry back before the age of sneakers and the export of our manufacturing base put an end to that industry in the US. Although it is not marked K & E it is a known fact they made it.  K & E, or Keuffel & Esser were known to make specialty rules, but I have never seen it listed in a catalog.

Mr. Reymond held several other patents for devices related to leather as well.  I have never seen those.  Think about the size of the possible market for a rule like this even in the heyday.  How many buyers of leather hides for the shoe making industry were going to need, or needed to carry one of these around to figure out how many pairs of shoes were going to come out of a given cowhide they were about to buy.   This rule is an prime example of filling a need that existed in just a few peoples minds.  That is what makes it a good one and a rare one.

The other one I had predated this example, as this one is clearly marked with the patent date as well as the copyright dates.  The serial # on this one is 297.  I imagine that very few were produced, and that even fewer survived.  

Overall the rule is very nice.  There is some old writing on the surface as if the owner was making his own calculations at one point.  Also there are two small empty holes that make it seem that a pointer may be missing or has been moved.  There are 3 present    The box is nice and shows good age.   There are not going to be a lot of opportunities to own another one of these. A very interesting rule for the collection.  Opportunity!!

Good + . . . . . $475.00        SOLD!!




Reymond  Shoe Leather Calculating Slide RuleReymond  Shoe Leather Calculating Slide Rule   This is a rare slide rule.  It is a first model and marked patent appl'd for.

Good + . . . . . $675.00        SOLD!!







Keuffel & Esser / K & E 68 1400 ANALON Slide Rule w/ Leather Case Keuffel & Esser / K & E 68 1400 ANALON Slide Rule w/ Leather Case     The condition of this rare K & E Sliderule is very nice. There is no damage to the rule, cursor, or orange leather case.  The 68-1400 Analon was one of K & E's last specialized rules, it is said that there were but 1000 made making this one with serial # is 009619 one of the last.  Super hard to find.   A piece of calculation history in super condition.

Fine . . . . . $495.00         SOLD!




K & E / Keuffel & Esser 4100 Stadia Slide RuleK & E / Keuffel & Esser 4100 Stadia Slide Rule   This is a very nice, and very hard to find rule by K & E.  Stadia rules were used by surveyors or engineers to figure elevations and distances in the field.  The cursor is a little dirty, but the rule box and case look to have never been used.  Very Unusual and very nice!!

Fine . . . . . $175.00 SOLD!!




Keuffel & Esser / K & E 68 1749 (Old 4096) Merchants 20 Desk Top Slide Rule w/ Hard CaseKeuffel & Esser / K & E 68 1749 (Old 4096) Merchants 20" Desk Top Slide Rule w/ Hard Case  The 68-1749 desk top slide rule was offered for use in offices or atop most any desktop.  It came in a hard case and was equipped with feet to hold it on an angle in front of the user. Prior to 1962 it was numbered 4096 or N4096.  At some point near the end of their production of slide rules K & E changed the numbers to ones like this beginning in 68. This later variant in the hard case is found much less often than the typical model and they were made for only a few years after the model change to 68-1749 and when K & E finally got out of the slide rule making business after the introduction of electronic hand- held's ended their long run of slide rule making.

The condition is very nice. There is no damage to the rule, cursor, or box. Note the condition of the finish on the mahogany in the views from the back. The paper conversion chart there is flawless as well. The pads on the cast iron feet show no wear either. A super piece of calculation history in super condition.

Fine . . . . . $275.00        SOLD!!



Keuffel & Esser # <4110> 14.5" Slide Rule  The rule itself is in super condition. The serial # is 799672.  The case body is OK, showing normal wear and age and the flap has been taped on with Priority tape.  The framed cursor is flawless.  The rule is straight, slides nicely and has no problems. There have only been a couple of these offered over the past couple of years on the internet. and it is a rare rule that was not offered in any of the catalogs that I have, and was given a 5 rating in the cheat sheet that I have.  I have given you a shot of the side with the scales so that you can decide what exactly the unusual scales are and what it was intended for.   I have read that these were made for West Point, but really have no information on that.

Good . . . . . $275.00         SOLD



K & E Deci-Lon Slide Rule 68-1100 in Original Box and Case Serial #088272   The rule and  the exterior of the case are in super condition.  The owner, Guy Endicott did stamp his name into the exterior of the case, and wrote it again inside the flap.  Otherwise the rule and case are minty nice.  The box is nice noting that the price and the fact that this was 12 of 17 was written on the lid in marker.  The book appears to have never been used, and as can be seen the lifetime guarantee is includes as well.  These are tough to find in this condition.

Good . . . . . $275.00          SOLD



K & E <N4088-3>  12" Slide Rule w Column Cursor   The rule itself is very nice.  There are 2 patent dates on the top rail from June 5th 00, and Dec. 22 08.  The original owner a Mr. Robert Morrison has carefully scratched his name into the end plates holding the rule together.  It has K & E's second model column cursor and there are no problems, damage or cracked glass in it.  The case is  in a sorry state,  missing its top and being taped top and bottom, but is original, as he same owners name can be found here as well.  Rare and worth the expense.

Good . . . . . $175.00         SOLD



Keuffel & Esser Peerless Reckoning or Calculating Machine   Keuffel & Esser offered this type of machine from about the turn of the Century until 1922.  They referred to it as "The Perfect Calculating Machine" I believe this model operates on the stepped drum mechanism.   This is the earlier model, and my K & E catalog from 1913 shows the later model with metal sides and legs. This is a great looking machine and is fully operational.  I believe it is the #4007 that went out to10 places and the catalog says it is capable of 20 places.  They made smaller models as well, but this was the largest size produced.  It is fully operational and the only detraction is the cracked slate board in the left corner for the operator to do rough preliminary calcs on.  Looking at this you really can get a sense of just how far we have come in the last 100 years.

Good . . . . . $2450.00         SOLD



K & E Deci-Lon 5 Slide Rule 68-1130 in Original Box and Case Serial #010628   The rule and  the exterior of the case are in very nice condition.  It appears that at one point there case did get wet or dirty on one of the top flaps and is slightly discolored on the inside.  It still looks OK.  The box is nice, and has the outer slip cover as well.  Also included is the lifetime warranty, I wonder how that works, do they give you a new hand held calculator? when this one breaks.    The care and maintenance pamphlet is here also.  These are tough to find in this condition, and in their boxes.

Good . . . . . $295.00          SOLD



Keuffel & Esser  <4031> 5" Slide Rule w/ Frameless Cursor   This 5" K & E rule is in excellent condition, and so is the case.  The serial # is 97938.    The hard to find frameless cursor is damage free and rarity in itself.  A hard to find rule that was not produced for long with this style cursor.  You will not find a nicer one!

Good . . . . . $75.00         SOLD



K & E #4160 Chemists Slide Rule  The rule and leather case are near flawless and the Keuffel & Esser #4160 Chemists rule  is one of the most desirable and sought after of all specialty rules that Keuffel & Esser ever produced.  As an added bonuses this rule is coming with the hard to find magnifier that K & E  sold as an accessory and the special case  with the provision for the magnifier built in that the proud owner also bought to protect his new investment.  He even kept the cardboard box, as can be seen, which is a Generic for the humped case to fit the 4160 and a few other rules.  The end label on this box gives the other model slide rules that this case could also be used with.   All in all a special rule in exceptional condition and ready in all respects to take its place high up on the shelf in the collection.

Good . . . . . $250.00         SOLD



Keuffel & Esser <4081-3> 12" Slide Rule in case w/ Original Box and Manual    The outside of the push or slide box shows some wear, but otherwise this is mint.  The box says it is a 68-1220 or old 4081-3, and that is what the rule itself says.  The instructions on the cover say they are for a 68-2047 while on the inside cover it says it is for the 4081.  Guess you had to be a math and logic whiz to get through all of that. 

Good . . . . . $55.00        SOLD



Keuffel & Esser #4133 Roylance Electrical Slide Rule  This is the sort of rule that is getting to be harder and harder to find, especially in this kind of condition.  It is all nice, and the first one I have come across in several years.

Good . . . . . $75.00          SOLD



Keuffel & Esser <N 4096>   This unusual 22" desktop slide rule is in super condition.  The serial # is 509117 There are no problems other than one small flake from the laminate on the bottom rail.  This is a rare and unusual example of the top of the line desktop model rule that came equipped with cast iron feet to hold it at the proper angle.  There is also a knob to slide the middle leg along.  I do not know where the box went, but it is obvious that this super rule saw little if any use over the years.

Good . . . . . $175.00         SOLD



2 Keuffel & Esser <4081-3> 12" Slide Rules in cases  The top one is in a soft leather case and is in nice overall condition.  The serial # is 504215.  The bottom one is in a hard case and looks OK but has a cursor problem with a portion of 1 rail missing.  Its serial # is 231539outside o the push or slide box shows some wear, but otherwise this is mint.  The box says it is a 68-1220 or old 4081-3, and that is what the rule itself says.  The instructions on the cover say they are for a 68-2047 while on the inside cover it says it is for the 4081.  Guess you had to be a math and logic whiz to get through all of that.

Good . . . . . SOLD



Keuffel & Esser #4031 5" Slide Rule  Even though Wayne Feeley only gave this rule a 3 out of 5 in difficulty to find in his interesting and informative rarity chart for this famous maker of slide rules, it is nonetheless a very interesting and desirable slide rule, not only because of it general scarcity and wonderful condition, but also due to its unusual advertising for the Terry Steam Turbine Co. which is stamped into its face.    This rule has a frameless cursor, and the last patent date is from June of 1900, and so dates from pretty close to this date.  These early and small rules have all but disappeared from the marketplace are are getting to be near impossible to find today.  Go to ebay or to any other site and see how many  Deci-Lon's  or its equivalent are offered, and then try to find another of this model.

Good . . . . .  SOLD



K & E <N4088-3>  12" Slide Rule w Column Cursor    The rule itself is very nice.  There are 2 patent dates on the top rail from June 5th 00, and Dec. 22 08.  The original owner a Mr. Robert Morrison has carefully scratched his name into the end plates holding the rule together.  It has K & E's second model column cursor and there are no problems, damage or cracked glass in it.  The case is  in a sorry state,  missing its top and being taped top and bottom, but is original, as he same owners name can be found here as well.  Rare and worth the expense.

Good . . . . .    SOLD



K & E <4088-5>  20" Slide Rule    This rule itself is very nice.  The one apology is that one pane of the frameless cursor on one side has a crack in it.  The rule is nice, and with a light cleaning will look even better.  There is no missing laminate, and the previous owner did not put his initials or other marks anywhere on it.  There is no case.

Good . . . . .  SOLD



Keuffel & Esser #4053-2 8" Frameless Cursor Slide Rule  The rule and cursor and its case are in nice, but used condition and should not disappoint you in any way.  It has a frameless cursor which has the Patent info in the end of 8-17-15.  The case body is OK, but the flap has been resewn sometime in the past.  These 8" rules are much rarer than the sales results from Ebay would indicate, where much newer and many times more common rules bring more than these or some other truly scarce rules that K & E produced.  This is an emerging collector category, and when the dust settles, I think I would rather have a box full of these than Deci-Lons.  You choose!

Good . . . . .   SOLD


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