RAF Mark II

Plano concave glass
Ground glass, flat on one side and heavily concaved on other.
Diameter 3.25" (8.3cm) Thickness 0.75" (2cm)

Object Details

ID: ACO0310
Type: Plano Concave Glass - aircraft compass
Display location: Not on display
Creator: Royal Aircraft Factory
Date made: Unknown
Credit: National Maritime Museum, Greenwich, London, Admiralty Compass Observatory
Measurements: Overall: 20 mm; Diameter: 84 mm