Gyro Horizon Indicator, Mk IC, RAF, US Navy, NOS, Ref 6A/1649 PB2Y Coronado The rims of the red

The rims of the red and green lights rotate to dim or brighten the lights when illuminated

According to the Maintenance Interchangeability Chart dated Feb 1945

We know of no other aircraft that used this fuel indicator

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

Gyro Horizon Indicator, Mk IC, RAF, US Navy, NOS, Ref 6A/1649 PB2Y Coronado The rims of the redHere 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