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MULLARD U30 RECTIFIER VALVE, 1920's

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MULLARD U30 RECTIFIER VALVE, 1920's

Early Rectifier valve made by Mullard Valves in the early 1920's.

Maker known then as the Mullard Wireless Service Company Ltd

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A0789



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