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'Marconi Otophone', by Marconi Company, London, 1923

Inventory Number: 59451

59451-3t 59451-2t 59451-4t 59451-1t

Date: 1923

Maker Details: Signed by Marconi's Wireless Telegraph Co. Ltd.

Inscription: "'MARCONI OTOPHONE' / INST. No 1258. / MARCONI'S WIRELESS TELEGRAPH CO LTD / LONDON" on celluloid plaque upon upper surface of instrument.

Size: 310 x 200 x 100 mm (case, excluding handle)

Materials: Leather, celluloid, mahogany, plastic?, bakelite, glass, nickel.

Other Given Number(s): Christie's 96, 855 (white tag).


'Marconi Otophone' (Scientific Aid for the Deaf), with two DE3 valves and black plastic? earpiece, in mahogany case inside leather attaché-case. With 66V and 3V nickel-plated terminals upon vertical ebonite panels at rear of interior. With filament and strength switches visible in middle of interior. With photocopied Wireless World and Radio Review article.

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