Légende
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)