Altimeter (Contact), Luftwaffe, Fl.22317 JU-87 Stuka, JU-88, Kontakt-Hohenmesser H-21 Likely made for an Israel

Likely made for an Israel Aircraft Industries (IAI) Westwind (formerly Aero Commander 1121 Jet Commander)

Here are two types of aircraft Pelorus Drift Sight

There is a small window on the altitude side just below "1000"

with focal length from 2 to INF and f-stop 1

Altimeter (Contact), Luftwaffe, Fl.22317 JU-87 Stuka, JU-88, Kontakt-Hohenmesser H-21 Likely made for an IsraelThis is a well worn example of the Contact Altimeter (Kontakt Hohenmesser) Fl. 22317 as used in the WWII era JU 87 Stuka and JU 88 dive bombers and some ME 110 fighters of the German Luftwaffe. See the illustration of the JU 87 blind flying panel showing the location of this altimeter. It is missing its center adjustment knob. This altimeter as designed had two hands and two front nested knobs. The white pointer indicates the aircraft altitude, from 0