Exhaust Pressure Differential Gauge, Fl20515, Luftwaffe F8F The case is in fine

The case is in fine shape for its age

as well as the mileage flown

evidence of a manufacturing year of 1944

Here is an interesting video describing how the K-13 functioned

Exhaust Pressure Differential Gauge, Fl20515, Luftwaffe F8F The case is in fineThis 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.