Temperature Indicator Type AN-5790-6: P-51, B-17, P-38, P-40, P-47 Constellation Here is a dual Tachometer

Here is a dual Tachometer for use in military helicopters

F-105 Thunderchief (see photo)

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

was made by RC Allen

signaling to the Turret Trainer if the 'laying'

Temperature Indicator Type AN-5790-6: P-51, B-17, P-38, P-40, P-47 Constellation Here is a dual TachometerHere 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