Addipresto 

Addipresto 

AddoX, ElectroMechanical 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. 

Comptometer 993e, ElectroMechanical Calculator 

Consul the Educated Monkey working replica 

Contex 

Countess 

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

Curta Type I Number 29249 

Facit 

Fraction of an Inch Adding Machine 

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 

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

Gerber Scientific Instrument Company Variable Scale TP007100 

Gerber Scientific Instrument Company Graphanalogue GA 103 

Marchant, Block and Anderson Ltd. London and Darlington, Branches Birmingham, Bristol, Cardiff, Glasgow Liverpool, Manchester, Newcastle, Nottingham, Sheffield, Southampton.ACT10M243147. 

Mr.Smart 

Muldivo Mentor 

Multical 

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 HL21 

Olivetti 

Original Ohdner 

Pencil Box with Multiplication Table 

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. 

Qeeen Elizabeth II Coronation Pencil Case Calculator 

Recnomatic 

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 rightmost column it would be neccessary to press the 9 and the 2 or the 8 and 3 etc, whichever one prefers. The rightmost digit counts up to 11 before carrying to the Shillings digit. 

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

Swift 

Triumphator 

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