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Aircraft bubble sextant.

1947-1952

Aircraft bubble sextant.

1942-1948

Aircraft bubble sextant.

1919-1922

Aircraft bubble sextant.

1942-1947

Aircraft bubble octant.

1939-1942

Aircraft bubble sextant.

1942-1945

Aircraft bubble sextant.

1940-1947

Baker type aircraft sextant.

1917-1922

Aircraft bubble sextant.

1942-1947

Aircraft bubble sextant.

1940-1945

Aircraft bubble sextant.

1940-1945

Gyroscopic sextant very probably made by Carl Plath, Hamburg, Germany, about 1943. Marked on the left side of the casing: Seekreiselsextant | Gerat 616-42A | Hersteller gtl. Casing of grey and black-lacquered aluminium and artificial materials, with black plastic fittings, housing optical equipment, a clockwork averaging mechanism, electrical equipment, and a rubber eyecup. Four shades, no. 2 is missing (all grey). Three batteries, of which two are incomplete (one is possibly from another instrument); a battery charger; eight spare light bulbs (2,5 volt); two blue light bulbs (110 volt), one possibly from another instrument. The bayonet handle is stored separately (hazard). In a fitted wooden carrying case containing in the lid printed handling instructions in German by the Deutsche Seewarte. The case is marked on the outside: 6380.

Aircraft gyroscopic sextant with case.

1941-1945

Periscopic bubble aircraft sextant, Type 1A, No. 2053, by Kelvin and Hughes (Aviation) Limited, Barkingside, Essex, England, 1950-1951. The periscopic bubble aircraft sextant was used on the De-Havilland Comet passenger jet aircraft.

Periscopic bubble aircraft sextant: Type 1A, No. 2053

1950-1951

Aircraft sextent. Manufacturer and date unknown.

Aircraft sextent. Manufacturer and date unknown

Bubble sextant made by Bausch and Lomb Optical Company, Rochester, NY, USA, about 1944. Type AN 5854-1, with battery case and connector, and suspension arm ( Bausch and Lomb Optical Co., Rochester, N.Y.). Serial no. AF-44-7651; spares: lamps (3), orange filters (3) In a carrying bag.

Aircraft bubble sextant.

1942-1945

Periscopic aircraft sextant made by Baird-Atomic, Inc., Cambridge, Massachusetts, USA, about 1960. Type AQU-1/A

Periscopic aircraft bubble sextant.

1955-1965

Gyroscopic octant made by Pioneer Instrument Co., Inc, Brooklyn, NY, USA, about 1944. The gyro is driven by an electric motor. Type no.3000A-1. Incomplete. Not seen WMB

Aircraft gyroscopic octant.

1942-1943

Bubble octant made by Bendix Aviation Corporation, Bendix, New Jersey, USA, about 1942. Type A.7, U.S.A.A.F. (Bendix Aviation Corp. Bendix, N.J., U.S.A.). Serial no. AF-42-710. This instrument was initially designed about 1934.

Aircraft bubble octant.

1942

Baker air sextant designed by Instructor-Commander T.Y. Baker, RN, BA, and made by Henry Hughes and Son Ltd, London, about 1920. Not seen WMB.

Baker type aircraft bubble sextant.

1918-1923

Bubble sextant probably made by Henry Hughes and Son Ltd, London, about 1942. Marked on the left side of the casing: [crown] | A.M. | Bubble Sextant | Mark IXBM | Brit. Pats | 480112 490621 | and pending [and] Mod. Inst. 19/99. Marked on the right side of the casing: Serial N° 3260/42. Marked on the averager: [crown] | A M | Serial n° 4564/42. Scale from 0° to 80° every 1°. Vernier to 1'. Black cracle-lacquered alloy casing incorporating artificial materials, housing optical equipment, a clock averaging mechanism, electrical equipment, and two rubber eyecups. Three shades (all red). In a fitted Bakelite case with a leather carrying strap, and containing a calibration sheet and a check list, both dated July 1969.

Aircraft bubble sextant.

1940-1945

Aeronautical bubble octant, with averaging mechanism, German, about 1944-5. Great Nr 127-134B-4, Werk Nr 6545596, Reference no Fl23750 Not seen, WMB.

Aircraft bubble sextant.

1944-1945