GYROCOMPASS

England, London, around 1940
Non-magnetic compass used to find geographical direction. In aluminium case. Marked by manufacturer on a label: "THE SPERRY GYROSCOPE CO. LTD., LONDON, DIRECTIONAL GYRO, PATENT BRITISH, 213791, 379139, 393354, 394412, 419816, 425954, 425957, CZECHOSLOVAKIAN PATENTS APPLIED 2671/1933 5989/1934, OTHER PATENTS PENDING, PATENTED IN ALL PRINCIPAL COUNTRIES". Marked on dial with a logo and inscription: "DIRECTIONAL GYRO, SER. NO. L10938, THE SPERRY GYROSCOPE CO. LTD., LONDON", engraved "MR. 4.34". Working mechanism, function not detected. Size16x12x12 cm. In airplanes Spitfire and Hurricane. Condition B.