Compass glass

Wooden box: 10 x 10 x 2" (25.4 x 25.4 x 5.1cm)
Compass glass for mounting and testing cards (?). Bronze socket for pin in centre.

Object Details

ID: NAV0403
Type: Compass glass
Display location: Not on display
Creator: Unknown
Date made: circa 1910
Credit: National Maritime Museum, Greenwich, London
Measurements: Overall: 3 mm; Diameter: 210 mm