Felt and Tarrant Comptometer, 1887.
Image number: 10210532
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 mass-produced office calculators.
- Image number:
- Science Museum/Science & Society Picture Library
- Date taken:
- 29 October 2003 12:00
- Image rights:
- Science Museum