GEM calculator, 1890.

Made:
1890-1900 in England

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"Gem" calculating machine, J. Guthrie's patent No.15062, 1890

Gem' calculating machine, J.Guthrie's patent No 15062, 1890. The GEM calculator is a simple device for the addition of English money. Numbers are added by inserting a stylus against the figure and pulling downward.

Details

Category:
Mathematics
Object Number:
1905-118
Materials:
metal (unknown), paint, paper (fibre product) and wood (unidentified)
type:
adding machine (stylus) and adding machine (stylus) and adding machines (stylus)
credit:
Major-General H.P. Babbage