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Aircraft bubble sextant.

Aircraft bubble sextant.

1919-1922
Bubble Sextant MK IX

Bubble Sextant MK IX

1939-1941
Aircraft bubble sextant.

Aircraft bubble sextant.

1940-1945
Aircraft bubble sextant.

Aircraft bubble sextant.

1942-1945
Aircraft bubble sextant.

Aircraft bubble sextant.

1940-1945
Aircraft bubble sextant.

Aircraft bubble sextant.

1942-1948
Aircraft bubble sextant.

Aircraft bubble sextant.

1940-1947
Aircraft bubble sextant.

Aircraft bubble sextant.

1942-1947
Aircraft bubble sextant.

Aircraft bubble sextant.

1942-1947
Attachment for bubble sextant

Attachment for bubble sextant

1940-1947
Seperate bubble chamber for bubble sextant

Seperate bubble chamber for 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
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
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 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
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 ... Germany, about 1940. no. blc 193001.

Aircraft bubble sextant.

1939-1942