Original, Rare WWII German Luftwaffe 0-3 kg/cm2 Druckmesser (Pressure Gauge) Fl. 20504-3 as used in the late-war Me109 and Fw190 fighter aircrafts. It was located on the side console or main instrument panel of the Me-109 and Fw190. The 0-3 kg/cm2 Pressure Gauge and measured the pressure of the MW50 or GM-1 system which sent Methanol into the engine. The original air line is also still attached.