Altimeter, Luftwaffe, Fl.22316-10, R.Fuess 1938 Hohenmesser

German (Luftwaffe) Altimeter Dated 12.9.1938, to 10,000 meters.

According to AircraftCockpits.com, this was used in Luftwaffe aircraft such as Bu131, Late war He72, Ju52, and Klem KL35.