Dry card compass

Dry card compass

Pocket compass Dry card
Brass case Paper card
Single flat bar Magnet mounted under paper card. Four wax spots for balance.
Floating card with quadrantal graduations to nearest 10 degrees in addition to 32 points. (The 2 degree graduations have apparently been trimmed off at some time)

Object Details

ID: NAV0208
Type: Dry card compass
Display location: Not on display
Creator: Spencer & Co
Date made: circa 1820
Credit: National Maritime Museum, Greenwich, London
Measurements: Overall: 29 mm; Diameter: 66 mm
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