Pocket-watch parts assembled inside a watch plate at the Illinois Watch Company in Springfield, Illinois.
Springfield Illinois USA Date:1922 Duration:4 min 4 sec Sound:NO SOUND
The intricate processes in the manufacture of watch parts at the Illinois Watch Company in Springfield, Illinois. Weight of the balance is equally distributed around its axis to ensure uniform time in different positions. The weight of each balance screw is accurately determined. Each hair spring is tested for strength and assorted accordingly. A collet is attached to the hair spring. The balance is weighed to determine strength of hairspring required. A large model demonstrates the working of the escape wheel.
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