Exactus stylus-operated adding and subtracting device

Exactus stylus-operated adding and subtracting device Exactus stylus operated adding and subtracting device

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Creative Commons LicenseThis image is released under a CC BY-NC-SA 4.0 Licence

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Exactus stylus-operated adding and subtracting device
Science Museum Group
© The Board of Trustees of the Science Museum

Exactus stylus operated adding and subtracting device
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Exactus stylus-operated adding and subtracting device, desk top model

Details

Category:
Mathematics
Object Number:
1994-1139
type:
adding machine (stylus)
credit:
Mr W.L. Causland