Original, working condition WWII German Luftwaffe 0-10km Hohenmesser Fl. 22316-10 (Altimeter), Fl. 22316-10,. Used in the Ju52, Bu131, KL35, He72 and other German fighter aircraft. This Hohenmesser was located on the main instrument panel of many early-mid-war German aircrafts and measured the altitude of the aircraft using the surrounding air pressure.