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Title: International Superelectric " Supervised" Secondary Clocks, 1930-1959 [Go to resource]
Description: The International Superelectric Time System. Two electric movements (secondary clocks) model 561-2 with two 6" dials and two pairs 6" hands, made by International Time Recording Co, 1930-1959. They were used in the workplace to regulate time the monitor hours worked. License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: time recorder Temporal: 1930-1959 Source: Science Museum Creator: International Time Recording Co. Ltd. Identifier: 1959-50 Go to resource More Like this...
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