Tina's Mechanical Calculators

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Abaci

Addiators

Circular Slide Rules

Pocket Watch Slide Rules

Cylindrical Slide Rules

Mechanical Calculators

Scientific Instruments

Drawing Instruments

Slide Rule Books

British Slide Rules

French Slide Rules

German Slide Rules

American Slide Rules

Japanese Slide Rules

World Slide Rules

Blundell

British Thornton

Fearn's and Mear's

Unique

Aristo

Faber-Castell

Nestler

Hemmi

Relay/Ricoh

Dietzgen

Keuffel and Esser

Pickett and Eckel

Slide Charts

Electronics

Curta Type I Number 29249

Addipresto

Addipresto

Addo-X, Electro-Mechanical Calculator

Bergmann Unical Universal Calculator. This is a large set of multiplication tables.

Burroughs, number A786493, produce by Burroughs Adding Machine Ltd., Nottingham, England, Parts Made in U.S.America.

Contex

Countess

Facit

Genaille Lucas Rods for Multiplication

Genaille Lucas Rods for Multiplication. This is a nice reproduction set made in USA by Creative Crafthouse.

Genaille Lucas Rods for Division

Gerber Scientific Instrument Company Variable Scale TP-007100

Gerber Scientific Instrument Company Graphanalogue GA 103

Gunter Rule 12"

Multical

Muldivo Mentor

Napier's Bones Reproduction

Napier's Berechenbar, a German version of Napier's Bones, it comes with only one set of Rods therefore whilst it works well as a demonstration piece you would need 5 or 6 for it to be useful for simple multiplication.

Nippon NCM HL-21

Olivetti

Original Ohdner

Sector

Solo

Spirule

Sumlock Comptometer

Sumlock Plus, Pounds, Shillings, Pence and Farthings Comptometer

Sumlock Comptometer, works with Pounds, Shillings and Pence. To add in 11 pence in the right-most column it would be neccessary to press the 9 and the 2 or the 8 and 3 etc, whichever one prefers. The right-most digit counts up to 11 before carrying to the Shillings digit.

Sumlock Comptometer, Shillings, Pence and Farthings as Decimals of a Pound

Comptometer 993e, Electro-Mechanical Calculator

Swift

Triumphator

Young's Tidal Depth Estimator. Designed by Walter Young, M.Inst. P.I., Manufactured by Smiths (Calculators) Ltd, Beaminster.

Fraction of an Inch Adding Machine

Consul the Educated Monkey working replica

Mr.Smart

Recnomatic

Qeeen Elizabeth II Coronation Pencil Case Calculator

Positional Arithmatic using Lego. The Sum 10101010 x 1001 in Binary (170 x 9 in Decimal) is set up on the first board. The answer 10111111010 (1530) is shown on the second board.

Cribbage Board a simple device for the addition and subtraction of points during card games

Pencil Box with Multiplication Table

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