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Clock without hands, used by Prof. John Donald to encourage farmers to keep accurate accounts, c. 1930 - Wisconsin Historical Museum - DSC03224
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Published by:
Creazilla
Author:
Daderot
Source:
commons.wikimedia.org
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self-published work
antiques in the wisconsin historical museum
cc-zero
files uploaded by daderot
pendulum regulators
clocks without hands
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