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.
Original, RARE WWII German Luftwaffe Altimeter Fl.22320. Type: 17c-B, Measuring range: 0 - 10 km
Manufacturer: R.Fuess, Berlin, Year of construction: 1941, Special feature: with adjustable marks "E" and "F", Installed: e.g. Focke-Wulf FW 190, Messerschmitt Bf 109, Arado Ar 96, Heinkel He 111, Junkers Ju 88 and many more.