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Bell Telephone Microphone, England, c. 1923
Inventory Number: 64147
Date: c. 1923
Maker Details: Unknown
Inscription: "LINE / COIL / MAGNET / COIL / No 246724" printed on upper surface of cylinder.
Size: 200 mm (in length) x 110 mm (in diameter)
Materials: Ebonite, cast brass, steel?, nickel.
Other Given Number(s): Christie's 70, Science Museum Loan 1924-508, 508 (white tag).
Notes:
Bell Telephone Microphone, with steel? ribbed cylindrical body, ebonite end with nickel-plated terminals and adjusting screws. With rear end of cast brass with three diaphragm damping screws. Exterior steel? casing quite badly damaged.
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