Temperature Indicator Type AN-5790-6: P-51, B-17, P-38, P-40, P-47 Constellation It has an overhaul stamp

It has an overhaul stamp on the rear case from Naval Air Station Penscacola (FL) dated Aug 1959

was made by RC Allen

including bombers B-17

the indicator displayed the pressure being applied to the rubber surface de-icer boots along the leading edges of the wings and empennage to dislodge ice which has formed

Temperature Indicator Type AN-5790-6: P-51, B-17, P-38, P-40, P-47 Constellation It has an overhaul stampHere is an authentic WW2 vintage Temperature Indicator type AN 5790 6, as appeared in the WW2 Fighters P 51D Mustang, P 40 Warhawk, P 47 Thunderbolt, and P 38 Lightning, as well as Bombers B 17 Flying Fortress and B 26 Marauder, and various aircraft of the US Navy and Marines. Made by Hickok, it was used to measure coolant temperature, carburetor air temperature, or outside air temperature, and the label of those locations would be added directly to