Catalogue
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Bell Telephone Microphone, England, c. 1923
Inventory Number: 35219
Date: c. 1923
Maker Details: Unknown
Inscription: "LINE / COIL / MAGNET COIL / No 246725" printed on upper surface of cylinder.
Size: 110 mm (in diameter) x 130 mm (in height, excluding screw)
Materials: Brass, ebonite, nickel.
Other Given Number(s): Christie's 71, Science Museum Loan 1924-509, 802 (white tag).
Notes:
Bell Telephone Microphone, with ebonite panel upon brass cylindrical. With four nickel-plated terminals and central nickel-plated adjusting screw. Lacking diaphragm assembly.
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