Magnetic Detector, by Marconi Company, London, Early 20th Century
Inventory Number: 75969
Date: Early 20th Century
Maker Details: Signed by Marconi's Wireless Telegraph Co. Ltd.
Inscription: "MARCONI'S WIRELESS / TELEGRAPH CO. LTD. / NO 63335 LONDON" printed on brass plaque upon upper surface.
Size: 480 x 130 x 210 mm (base only)
Other Given Number(s): Christie's 113, Science Museum Loan 1959-234.
Magnetic Detector, with screw tension adjustment, iron winding key and mahogany base, lacking removable glass-topped lid. With four brass terminals mounted on ebonite blocks, on each side. Terminals are marked E, T, T, A (Earth, Aerial) on each side. Wooden block mounted on top on case with two magnets on each side and brass plaque. With associated headphones.