Compass, German Luftwaffe Fl.23210 Führerkompass F.K .10/32, 1940 Czech The pointers will be aligned

The pointers will be aligned once the rotors are fully engaged

Also see the photo of the P-38A instrument panel from the RAF Lightning 1 Service Manual showing the indicator for the port engine

B-26 Marauder

Here is an article from Flight Magazine Sept 1943 describing the Astrograph

569432" and  "General Electric Canada"

Compass, German Luftwaffe Fl.23210 Führerkompass F.K .10/32, 1940 Czech The pointers will be alignedHere is a WW2 era German Magnetic Compass FI. 23210, made by Ludolph in August 1940. Commonly used in the Junkers Ju 52. Measures approximately 4. 5" wide by ~4" tall. It is in reasonable condition given its age. The compass fluid is no longer present.