Mechanical calculator by George B. Grant from 1877. Manually operated addition and multiplication machine, four-species machine. The numbers are set using the front rings/wheels and processed by turning the side crank, illustration, reproduction from a 19th century model. Authentic, file restored for optimal use, exact date of submission unknown, historical
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Mechanical calculator by George B. Grant from 1877. Manually operated addition and multiplication machine, four-species machine. The numbers are set using the front rings/wheels and processed by turning the side crank, illustration, reproduction from a 19th century model. Authentic, file restored for optimal use, exact date of submission unknown, historical

Date

20 juil. 2026

Crédit

Photo12/ImageBROKER/Sunny Celeste

Notre référence

BRK26H31_004

Model release

Non

Property release

Non

Licence

Libre de droits

Format disponible

103.9Mo (34.6Mo) / 62.0cm x 42.0cm / 7320 x 4960 (300dpi)

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