Slide Rules

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About Vintage Slide Rules

The slide rule, invented by William Oughtred in 1622, consists of two divided scales, one fixed and one movable, and a sliding window called a cursor. Slide rules were the primary tool for performing multiplication, division and other scientific functions up through the 1960s and the development of the electronic calculator.

There are straight, circular and cylindrical slide rules, all collectible. Major manufacturers included Keuffel and Esser, Pickett, Gilson, Dietzgen, Post (which became Teledyne), Faber-Castell, Aristo, and others. Early slide rules were made of wood and celluloid, while later ones tended to be plastic or metal...

The rarest slide rules are 19th Century hand-engraved instruments such as Palmers Computing Scale (a circular model), first published in 1843, or the cylindrical ‘Thacher’s Patent Calculating Instrument’ slide rules produced by Keuffel and Esser Co in the 1880s. These can run close to $1,000 in good condition.

Whatever you do, be sure any slide rule you buy is fully intact and working, as finding replacement parts for a specific model (especially the cursor) can be next to impossible.

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An Interview With Vintage Slide Rule Collector Mike Konshak

I’m 61 now, and I’m an engineer. I was thinking if I ever wanted to collect something, I would probably c…  [more]



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Top eBay Auctions    (get weekly Slide Rules email)

Status       Display       How this works
Keuffel & Esser Slide Rule New In Box 68 1200 Complete$178.17 Ends Tuesday 4 bids 14 watchers
Rare Vintage Faber Castell 2/82 Slide Rule Boxed Exc+$49.71 Ends Wednesday 10 bids 14 watchers
# Loga Modell Topo 6400 A Slide Rule Disk Rare # $49.00 Ends Tuesday 1 bid 12 watchers
Post Hemmi 1460 Versalog Slide Rule * W/ Case * Nice !$43.00 Ends Sunday 5 bids 13 watchers
10-inch K&e Deci-lon Slide Rule With Case And Inst Book$42.00 Ends Sunday 5 bids 16 watchers
Vintage Compass German Military Slide Rule Metal 17675$39.99 Ends Wednesday 1 bid 5 watchers
Keuffel & Esser Co. Log Log Duplex Decitrig Slide Rule$38.82 Ends in 19 hours 5 bids 6 watchers
K And E Deci Lone 10 Inch Slide Rule With Manuals$35.00 Ends Tuesday 1 bid 1 watcher
Halden Calculex Circular Slide Rule & Unrevised Tables$34.37 Ends Wednesday 4 bids 36 watchers
..vintage Slide Rule Teledyne Post Versalog .. Hemmi$33.32 Ends Tuesday 6 bids 16 watchers
Rare '61 Tektronix Circuit Computer Slide Rule W/manual$33.00 Ends Tuesday 3 bids 13 watchers
Vintage Aristo-studio Slide Rule No. 868 Engineers$32.61 Ends in 8 hours 8 bids 12 watchers
K&e Deci-lon Slide Rule And Case$31.47 Ends in 19 hours 4 bids 10 watchers
Ww2 1940 303 Vickers Mg. Slide Rule With Leather Case$27.47 Ends Wednesday 3 bids 10 watchers
Vintage Post Bamboo Slide Rule For Chemical Engineering$26.50 Ends Monday 4 bids 24 watchers
Antique Aw Faber Wood Slide Rule W/ Orig Box Calculate$26.00 Ends in 1 hour 3 bids 8 watchers
Pickett N1010-es Powertrig Trig Metal Slide Rule Boxed$26.00 Ends Sunday 6 bids 2 watchers
Vintage Antique Otis King Slide Rule Calculator Model L$26.00 Ends Thursday 2 bids 12 watchers
Vintage Faber Castell Slide Rule 62/83 Cased Germany$24.99 Ends Friday 1 bid 4 watchers
Vintage J Hemmi Sun Japan Slide Rule Cased Pat 51788$24.52 Ends in 19 hours 1 bid 14 watchers
Pickett N-600-es Slide Rule, Box And Case$24.50 Ends in 44 mins 9 bids 11 watchers
*** Circular Slide Rule Kl-1 *** Soviet Exc$24.00 Ends Wednesday 1 bid 2 watchers
Albert Nestler No 23 R/3 Sliderule Slide Rule Vintage$21.50 Ends Tuesday 6 bids 6 watchers
Vintage Danish Ole Jorgensen Circular Slide Rule Desk$20.68 Ends Tuesday 8 bids 36 watchers
Keuffel & Esser Deci-lon Slide Rule (68-1100) W/case$19.99 Ends Monday 1 bid 7 watchers
Vintage Pickett Pocket N3p-es Slide Rule N 3p Es Exclnt$18.50 Ends Sunday 3 bids 14 watchers
Pickett & Eckel N1006-es Slide Rule *no Reserve*$17.99 Ends Monday 1 bid 1 watcher
Pickett U.s. Air Force Aerial Photo Slide Rule Type A-1$17.50 Ends in 23 hours 2 bids 7 watchers
Faber-castell Vintage Slide Rule And Calculator$15.50 Ends in 17 hours 5 bids 9 watchers
Slide Rule Pencil Cup New Nos$15.50 Ends in 23 hours 4 bids 22 watchers
Mikuni New Nos Slide Rule Carburetor Pocket Tuner$15.50 Ends Sunday 5 bids 4 watchers
Keuffel & Esser Slide Rule 10 Deci Lon, With Case$15.50 Ends Wednesday 2 bids 17 watchers
Scarce Master Slide Rule Dahl Mfg. Co. 1910 Patent$14.95 Ends Tuesday 1 bid 2 watchers
Vintage Circular Binary Slide Rule W/ Case ~ Nice!$14.27 Ends Monday 3 bids 16 watchers
Interlox Master Slide Rule -- 72 - Inch -good Condition$10.99 Ends Thursday 1 bid 2 watchers
Vintage 1959 Pickett Slide Rule$10.49 Ends Monday 2 bids 10 watchers
Concise Circular Slide Rule Motorola Govt.electr.div.$10.49 Ends Tuesday 2 bids 6 watchers
Pickett N803-t Slide Rule--new Condition--$10.02 Ends in 14 hours 3 bids 2 watchers
Sun Hemmi 6" (15cm) Bamboo Slide Rule, Rare, Exc Cond$10.00 Ends in 23 hours 1 bid 3 watchers
Vintage K&e Deci-lon Slide Rule W Leather Case & Book$10.00 Ends Friday 3 bids 7 watchers
Pickett Electronic Slide Rule Model N-515-t With Case$9.99 Ends in 22 hours 1 bid 4 watchers
Vernon Sterling Silver Slide Rule Tie Clasp Clip$9.99 Ends in 23 hours 1 bid 14 watchers
Vintage Pickett & Eckel Slide Rule W/case 800-es$9.95 Ends Sunday 1 bid 2 watchers
Vintage Ricoh Bamboo Slide Rule X284 No. 113 Nib Case$9.95 Ends Wednesday 1 bid 4 watchers
Pickett 105c Profit Calculator Circular Slide Rule$9.50 Ends Tuesday 2 bids 7 watchers
Pickett N-600-t Dual Base Log Log Slide Rule, And Box$9.38 Ends in 44 mins 6 bids 10 watchers
Vintage Lafayette Concise Circular Slide Rule Japan$9.00 Ends Wednesday 1 bid 4 watchers
Vintage Pickett Slide Rule.engineering,$8.99 Ends in 12 hours 2 bids 4 watchers
Pickett Pocket Slide Rule Lot$8.50 Ends in 1 hour 9 bids 9 watchers
Vintage 1947 K&e Log Log Duplex Decitrig Slide Rule $7.99 Ends Tuesday 2 bids 1 watcher
Rare 1959 Spirule Circular Slide Rule W/manual$7.99 Ends Wednesday 1 bid 12 watchers
Pickett Leather Pocket Slide Rule Cases$5.24 Ends in 45 mins 5 bids 12 watchers

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