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Marconiphone Universal Baby Crystal Receiver, by Marconiphone Company, England, c. 1924
Inventory Number: 58056
Date: c. 1924
Maker Details: Signed by Marconiphone Co. Ltd.
Inscription: "MARCONI [TRADEMARK] / BBC [LOGO] REG NO 4216 / MARCONIPHONE BABY" printed on upper surface of base.
Size: 140 mm (wide)
Materials: Plastic, galena, nickel, steel, bakelite.
Other Given Number(s): Christie's 80.
Notes:
Marconiphone Universal Baby Crystal Receiver, mounted on a flat oval plastic base, and variometer tuned. Galena type crystal and cat-whisker in a small dustproof glass cylinder. With four nickel-plated components including four terminals, switch and cylinder lid. With additional plug-in component with bakelite dial. This item can be accurately dated to 1923-1924 as BBC logo ("TYPE APPROVED BY POSTMASTER GENERAL") was used from 1st November 1922 until September 1924. Instrument is also signed by Marconiphone Company which was founded in December 1923. Therefore, it is highly likely that instrument was made in 1924.
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