GEM calculator, 1890.

Image number: 10327833

GEM calculator, 1890.

The GEM calculator is a simple device for the addition of money. Numbers are added by inserting a stylus against the figure and pulling downwards. The design for this calculator was patented by J Guthrie in 1890 (patent no 15062).

Image number:
10327833
Credit:
Science Museum/Science & Society Picture Library
Date taken:
30 October 2003 09:16
Image rights:
Science Museum
 

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