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Aircraft bubble sextant.

1947-1952

Aircraft bubble sextant.

1942-1948

Aircraft bubble sextant.

1919-1922

Aircraft bubble sextant.

1942-1945

Aircraft bubble sextant.

1940-1947

Aircraft bubble sextant.

1942-1947

Aircraft bubble octant.

1939-1942

Baker type aircraft sextant.

1917-1922

Aircraft bubble sextant.

1942-1947

Aircraft bubble sextant.

1940-1945

Aircraft bubble sextant.

1940-1945

Aircraft sextent. Manufacturer and date unknown.

Aircraft sextent. Manufacturer and date unknown

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

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

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

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

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