Exhaust Pressure Differential Gauge, Fl20515, Luftwaffe F8F evidence of a manufacturing year

evidence of a manufacturing year of 1944

as well as the mileage flown

but seems to run

Stores Reference 6A/827 GE Type DJ4

Exhaust Pressure Differential Gauge, Fl20515, Luftwaffe F8F evidence of a manufacturing yearThis is a WWII era Exhaust Differential Pressure Gauge, Fl20515, as used in aircraft of the German Luftwaffe such as jet fighters Me 262 Schwalbe (see illustration of Me 262 cockpit panel showing the location of 2 indicators) and He 162 Volksjger. The gauge indicates pressure differential up to 1 kg per square cm. The indicator is in very good condition given its age. Measures ~2. 25 inches diameter and ~3 inches deep.