This mechanical guage was produced around 1943-1945 and measured the engine RPM.  It was located on the main instrument panel of the aircraft and was only used in the Me109, Fw190, Ju87, Me110, and others. 

Made of aluminum and bakelite, this instrument is in EXCELLENT condition and all dials work smoothly and correctly.  98% of the original paint remains, and it still retains its original data label, indicating Fl 20222! I have indicated its location in the last photos  A PERFECT addition to any collection, display, or restoration project!