ORIGINAL, VERY NICE WWII German Luftwaffe Rate of Climb / Vertical Speed Indicator,+5/-5 m/s. Used in aircraft of the German Luftwaffe, measuring vertical speed in a climb or descent from - 5 meters/second to + 5 meters/second. It appears to be Fl.22379, although it is not marked with an Fl number. Measures ~3.25 inches diameter and ~2.5 inches deep. It is in reasonable condition given its age. It was located on the main instrument panel of many German
gliders- Grunau Baby, DFS Meise, NSK, Horten, and others.