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'Marconi' Auto-Alarm Buzzer Type 225, by Marconi Company, England, c. 1920
Inventory Number: 34759
Date: c. 1920
Maker Details: Attributed to Marconi's Wireless Telegraph Co. Ltd.
Inscription: "TYPE NO 225" etched into base surface.
Size: 100 x 50 x 40 mm
Materials: Metal, ebonite?, aluminium, steel.
Other Given Number(s): Christie's 106, Science Museum Loan 1960 278 PT, (106) 963/5 (white tag).
Notes:
'Marconi' Auto-Alarm Buzzer Type 225, for use with 'Marconi' Auto-Alarm, with painted black metal case, two aluminium terminals, off/on switch on ebonite? base. For maritime use. Previously catalogued and associated with 'Marconi' Auto-Alarm Receiver Type 332 (Inv. Num. 41271), 'Marconi' Auto-Alarm Selector Type 333 (Inv. Num. 22770), 'Marconi' Auto-Alarm Bell Type 117 (Inv. Num. 14147), 'Marconi' Auto-Alarm Morse Key Type 316A (Inv. Num. 82360).
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