Boat's liquid compass

Bowl-Black painted brass, filler plug at side, expansion chamber at base. Inside of bowl painted white with black painted lubber line. Mounted in gimbal ring 6" (15.2cm) diameter.
Card- Diameter 4" (10.2cm). Mica (?) painted white with black markings, graduated to 360 degrees. White painted metal flat at centre.

Object Details

ID: ACO0744
Type: Boat's liquid compass
Display location: Not on display
Creator: E. S. Ritchie & Sons
Date made: circa 1939
Credit: National Maritime Museum, Greenwich, London, Admiralty Compass Observatory
Measurements: Overall: 130 mm x 165 mm x 150 mm
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