Boat's liquid compass

Boat's liquid compass
Bowl: Black painted brass, filler plug at side, expansion chamber at base. Inside of bowl painted white with two black painted lubber lines 90degrees apart. Mounted in black painted brass gimbal ring 6.75" (17.2cm) dia in a crude wooden box 8.5" x 8.5" x 5.6" (21.6 x 21.6 x 14.2cm).
Card:4.0" (10.2cm) mica card painted white, with black markings graduated to 1/4 pointsand to 360 degress, attached high domed black float at centre.
Needle: Unsighted
Pivot: Unsighted

Object Details

ID: ACO0208
Type: Boat's liquid compass
Display location: Not on display
Creator: Edwin Bowers & Sons
Date made: circa 1939
Credit: National Maritime Museum, Greenwich, London, Admiralty Compass Observatory
Measurements: Overall: 145 mm x 215 mm x 215 mm