NEW, RARE, Original, working WW2 German Luftwaffe 0-10km Altimeter (Hohenmesser) Fl. 22320. Used in the Me109, Fw190, Me262, and other late-war German fighter aircraft. Hohenmesser Fl. 22320 instrument measured the altitude of the aircraft using the surrounding air pressure. It was located on the main instrument panel of many early and late-war German aircraft.