Liquid compass - aircraft

Bowl- Black plastic, filler plug at top, expansion chamber at back, back cover missing. Inside of bowl black with rluminous wire lubber line mounted across domed verge glass.
Card-Dia. 2.5" (6.4cm) black plastic with white markings, graduated to 360 degs. Attached to black plastic float at centre.
Needle- Two needles 1.5" (3.9cm) long, mounted below card.
Pivot-Inverted type with stem carrying pivot cup secured to bottom of bowl.

Object Details

ID: ACO1178
Type: Liquid compass - aircraft
Display location: Not on display
Creator: Unknown
Date made: circa 1940
Credit: National Maritime Museum, Greenwich, London, Admiralty Compass Observatory
Measurements: Overall: 110 mm x 85 mm x 85 mm
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