K&E Thacher's Calculating Instrument
K&E Thacher's Calculating Instrument K&E 4012 Thacher's Calculating Instrument |
K&E 4012 Thacher's Calculating Instrument Made in USA - Designed by Edwin Thacher Archive - Michael O'Leary Collection (USA)  |
Sperry's Pocket Calculator
 K&E 4017 Sperry's Pocket Calculator |
K&E 4017 Sperry's Pocket Calculator - c1908-1911 Made in USA, Mfg by K&E - Designed by Elmer A. Sperry, US Pat# 773,235 Oct 25, 1904 Dual Revolving Scales: S Dial: Tan, Log (equal parts), Sin (2 spirals) L Dial: C (3 spirals) Archive - Ebay picture, Courtesy of Clark McCoy |
 K&E 4017 Sperry's Pocket Calculator |
K&E 4017 Sperry's Pocket Calculator - c1903 Made in USA, Mfg by K&E - Designed by Elmer A. Sperry, US Pat.#773,235 Dual Revolving Scales: S Dial: Tan, Log (equal parts), Sin (2 spirals) L Dial: C (3 spirals) Archive - Ebay picture, Courtesy of Clark McCoy |
 K&E 4017 Sperry's Pocket Calculator |
K&E 4017 Pocket Calculator sn S978 Made in USA, Mfg by K&E, - Designed by Elmer A. Sperry, US Pat.#773,235 Dual Revolving Scales: S Dial: Tan, Log (equal parts), Sin (2 spirals) L Dial: C (3 spirals) Archive - Ebay picture, Courtesy of Clark McCoy |
K&E Pocket Calculator
 K&E 4018 Pocket Calculator (Circular Mannhiem) |
K&E 4018 Pocket Calculator sn 548 - c1913 Made in USA, Mfg by K&E, Designed by George Lange, US Pat# 1,012,660, Dec 1911 Front Scale: (C, D) Back scale: Tangents, Log, (Sines) Note: Scales are: Stationary (Revolving) Archive - Photo by Elliot Pearce Family - Original owner, James A. Pearce was a railroad civil engineer and WWI veteran. |
Fuller Fuller Rotary Calculator |
Fuller Rotary Calculator Made in United Kingdom - Designed by Prof. Fuller Archive  |
Calculigraphe H.C. Calculigraphe Boucher's System |
Calculigraphe Boucher's System Made in France - Calculigraphe by Henri Chatelaine of Paris Archive  Instructions 2.8Mb |
Charpentier Charpentier Calculimetre |
Charpentier Calculimetre Made in France - 5.92cm diameter Front Scale: D, C ( W1, W2) Back scale: L, S, T Archive - Giovanni Breda Collection |
Fowler Mechanical Engineer Chronograph - 3 sizes |
Mechanical Engineer Chronograph c1900-1910 Made in Manchester, England by Thomas Fowler Fowler was also known as: Scientific Publishing Company Archive - Jim Bready Collection (UK) |
C. Mander  C. Mander Sliding Gauge Rule |
C. Mander Sliding Gauge Rule Made in UK, London Front Scale: TBD Back scale: TBD Archive - UK Slide Rule Circle |
Aston and Mander Makers  Aston And Mander Makers - Carter's Rivet Pitch Calculator |
Aston And Mander Makers - Carter's Rivet Pitch Calculator Made in UK, London Front Scale: TBD Back scale: TBD Archive - UK Slide Rule Circle |
 Aston And Mander Makers- Dixon Style Slide Rule |
Aston And Mander Makers - Dixon Style Slide Rule Made in UK, 25 Compton ST, London Front Scale: TBD Back scale: TBD Archive - UK Slide Rule Circle |
 Aston And Mander Makers - C. Hoare Slide Rule |
Aston And Mander Makers - C. Hoare Slide Rule Made in UK, 25 Compton ST, London Front Scale: TBD Back scale: TBD Archive - UK Slide Rule Circle |
 Aston And Mander Makers - Ship Tonnage Calculator |
Aston And Mander Makers - Ship Tonnage Calculator Made in UK, for G.L. Watson Co. Naval Architects and Surveyors 141 Sauchiehall Street, Glasgow Front Scale: TBD Back scale: TBD Archive - UK Slide Rule Circle |
 Aston And Mander Makers - Timber And Brick Pricing Rule |
Aston And Mander Makers - Timber And Brick Pricing Rule Made in UK, 25 Compton ST, London Front Scale: TBD Back scale: TBD Archive - UK Slide Rule Circle |
T.C. Ballardie  T.C. Ballardie - Merchant Vessel Speed And Power Scale |
T.C. Ballardie - Merchant Vessel Speed And Power Scale Made in UK, by F. Rosson &Co., 46 Dean Street, Newcastle on Tyne Front Scale: TBD Back scale: TBD Archive - UK Slide Rule Circle |
Dring and Fage  Dring And Fage - Brewers Slide Rule |
Dring And Fage - Brewers Slide Rule Made in UK Front Scale: TBD Back scale: TBD Archive - UK Slide Rule Circle |
  Dring And Fage - Brewers Slide Rule Set |
Dring And Fage - Brewers Proof Slide Rule Set Made in UK Front Scale: TBD Back scale: TBD |
Loftus  Loftus - Brewers Slide Rule |
Loftus - Brewers Slide Rule Made in UK, London Front Scale: TBD Back scale: TBD Archive - UK Slide Rule Circle |
Roberts  Roberts - Everard Type Gaugers Rule |
Roberts - Everard Type Gaugers Rule Made in UK, London Front Scale: TBD Back scale: TBD Archive - UK Slide Rule Circle |
Tavenier - Gravet REF Tavenier-Gravet |
Tavenier-Gravet - c1900 Made in France- Rue Mayet 19, Paris Front Scale 25cm // A, DF [ CF, CI, C ] D \\ 25cm Back Scale (Slide): [S, L, T ] Cursor: Brass Chisel Point Archive - Rod Lovett Collection |
Otis King Otis King Model K Cylindrical |
Otis King Model K Cylindrical Made in England - 66 inch scales Serial number: S1117 Scales: 423 and 414 Archive - No Longer in Collection |