Golden Gem Adding Machine
Joe explores the Golden Gem Adding Machine, another mechanical calculating device from the early 20th century.
More on the Golden Gem: https://www.jaapsch.net/mechcalc/goldengem.htm
Видео Golden Gem Adding Machine канала Joe Van Cleave
More on the Golden Gem: https://www.jaapsch.net/mechcalc/goldengem.htm
Видео Golden Gem Adding Machine канала Joe Van Cleave
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