Grace's Guide

British Industrial History

Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 136,363 pages of information and 219,137 images on early companies, their products and the people who designed and built them.

Comptometer

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Exhibit at Beck Isle Museum.
Exhibit at the Bakelite Museum.
Exhibit at Coventry Museum.
Im201403Bow-Comp11.jpg
Im201403Bow-Comp12.jpg

Manufactured by Felt and Tarrant Manufacturing Co

The first successful key-driven adding and calculating machine[1]

See Also

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Sources of Information

  1. Calculator Time line[1]