Gyro Horizon Indicator, Mk IC, RAF, US Navy, NOS, Ref 6A/1649 PB2Y Coronado See photo of the location

See photo of the location of the instruments on the Flight Engineers lower instrument panel from the C-121 flight manual dated 1958

See photo of the cockpit of the F9F-5 from its flight manual dated 1955

the cover is loose (but we may repair it) with a few ripped edges

The indicator provides directional and course information to the pilot as transmitted from the gyros mounted elsewhere within the aircraft

Gyro Horizon Indicator, Mk IC, RAF, US Navy, NOS, Ref 6A/1649 PB2Y Coronado See photo of the locationHere is a WWII era Gyro Horizon Indicator, aka Artificial Horizon, Mark IC, Stores Ref 6A 1649, made by Sperry in 1944 (part number 650412), as used across various aircraft of the British Royal Air Force. It appears to be New Old Stock as the red protective paper disc over the vacuum filter is still in place. Common to the British version is the lack of a caging knob, whose purpose is instead fulfilled by a caging screw on the bottom of the case which