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'How to build a two valve set', No 24, Godfrey Philips cigarette card, 1925.
© Science and Society / SuperStock
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Image Keywords: 1920s, batteries, building, components, diagrams, DIY, England, equipment, flex, instructions, kits, plugs, radios, receivers, science museum, Step-by-step, telecommunications, Terminals, wires
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Contemporary
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