Altimeter, Luftwaffe, Fl.22316-10, R.Fuess Hohenmesser 1939

This is a WWII-era Altimeter of the German Luftwaffe, Fl.22316-10, model 17b, manufactured in 1939 by R.Fuess. This altimeter measured altitude up to 10 kilometers.  Above the center axis is a window to display barometric pressure in millibar, with which the altimeter could be corrected by rotating the bottom center knob.  This altimeter was used in Luftwaffe aircraft such as the Transport Ju 52.

It is in good condition given its age. The knob rotates and adjusts the barometric card.  Measures ~3.25 inches diameter and ~3 inches deep.