Wheel and Flap Position Indicator Type A-3 GE 8DJ17AAK Grumman The yellow paint on the

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)

but its ability to light is unknown

Type 98 Otu

See photo of the indicator the F7F Flight Manual  dated 1947

From our research

Wheel and Flap Position Indicator Type A-3 GE 8DJ17AAK Grumman The yellow paint on theThis 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