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STC MERCURY VAPOUR 3V/531E VALVE, 1940's

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STC MERCURY VAPOUR 3V/531E VALVE, 1940's

Mercury vapour type rectifier made by S.T.C.

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A0651



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