Ammeter Strommesser Luftwaffe Fl32509-4 A4 Skyhawk According to Flight Magazine dated

According to Flight Magazine dated 1957

The C-12 Altimeter was used across all aircraft of the Air Corps US Army

This is a triple Trim Tab Position Indicator

Also common to the British version is the stamped statement "Do Not Jar Handle Like Eggs"

the TBM Avenger Torpedo Bomber

Ammeter Strommesser Luftwaffe Fl32509-4 A4 Skyhawk According to Flight Magazine datedThis is a WWII era aircraft Ammeter (Strommesser) Fl 325509 4, as used in aircraft of the German Luftwaffe. It is 1 3 4" diameter, and 1 3 4" deep mounted in a black, steel cylinder by two small slotted screws. It has a movable pointer to indicate the current in an electrical circuit. There is a "0" above an "A" at center position flanked by a "L" and a "E" to the left and right of the scale, likely indicating negative or positive draw. stamped in