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

According to Flight Magazine dated 1957

This is a triple Trim Tab Position Indicator

such as in versions of the heavy bomber Lancaster and fighters Spitfire and Beaufighter

the top compass card would rotate to match the heading on the bottom card

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

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