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Gray Magnetic Relay Key, by Marconi Company, London, c. 1910
Inventory Number: 56506
Date: c. 1910
Maker Details: Signed by Marconi's Wireless Telegraph Co. Ltd.
Inscription: "MARCONI'S WIRELESS / TELEGRAPH CO. LTD. LONDON / NO 390980 TYPE" on silvered metal plaque at front of device
Size: 190 x 160 x 40 mm (plinth height)
Materials: Teak, iron?, ebonite? wood, metal alloy, silver.
Other Given Number(s): Christie's 42.
Notes:
Gray Magnetic Relay Key, with condensor, fuse, key, alternator and transformer metal alloy terminals on teak plinth, with slivered metal company plaque. A relay key was used to reduce the burning of the contacts on the Morse key.
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