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FOB VOLTMETER, 1930's

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FOB VOLTMETER, 1930's

Pocket meter for engineers.
120 Volts DC could be a normal mains voltage before 1930.

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A0299



2007 The Museum of Technology, The Great War and WWII
Company registered in England No. 7452160, Registered Charity No. 1140352, Accredited Museum No. 2221