Wheel and Flap Position Indicator Type A-3 GE 8DJ17AAK Grumman From our research

From our research

See photo of the indicator the F7F Flight Manual  dated 1947

The yellow paint on the bottom was used to indicate if the pointer calibration screw had been tampered since last calibration (the paint is intact)

including PBY Catalina's

this acronym may be from an office of the Joint Intelligence Collecting Agency office in North Africa

Wheel and Flap Position Indicator Type A-3 GE 8DJ17AAK Grumman From our researchThis is an authentic WW2 vintage Landing Gear and Flap Position Indicator, Type A 3, made by General Electric, as used in the US Army Air Corps tricycle landing gear (wings & nose gear, vs wings and tailwheel) aircraft, such as medium bombers B 25 Mitchell, B 26 Marauder, A 20 Havoc, A 26 Invader, and fighters P 38 Lightning and P 61 Black Widow, according to the Maintenance Interchangeability Chart dated Feb 1945. See photos of instrument panels of B