Felt and Tarrant Comptometer, 1887.
3 2 c m
40cm
actual image size: 32cm x 24cm

Felt and Tarrant Comptometer, 1887.

© Science Museum / Science & Society Picture Library

Description

An early example of the Comptometer, with 72 numbered keys. The top of box has a plate engraved; 'Trade Comptometer mark, Patd. July 19th 1887, - Oct 11th 1887, Jan 8th 1889, June 11th 1889, Nov 25th 1890, Dec - 15th 1891, Felt & Tarrant Manufacturing Co, Chicago'. The Felt and Tarrant Comptometer was one of the first generation of mas-produced office calculators.
 

Image Ref.

10210532
 

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