Real life wrist radio

No batteries, no electricity – I wonder how they did this…

(from America’s Best Comics # 23, 1947, with thanks to the many scanners)

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2 Responses to Real life wrist radio

  1. OtherMichael says:

    That would have to be a crystal radio — they don’t need power, but they don’t amplify sound, either. See the reference to the “powerful crystal detector” and “built-in earphone.”


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