Compass card

Dry card compass card. Thomson's patent 10 inch card with 8 needles.

Object Details

ID: ACO1021
Type: Compass card
Display location: Not on display
Creator: Kelvin Bottomley & Baird Ltd
Date made: circa 1879; about 1914
Credit: National Maritime Museum, Greenwich, London, Admiralty Compass Observatory
Measurements: Overall: 4 mm; Diameter: 252 mm
Parts: Compass card