Fuhrertochterkompass, Fl23334, German Luftwaffe Do-17 the lower center indicator displays

the lower center indicator displays a flap symbol along the scale showing the amount of flap deployed

and one adjustment knob

which was eventually replaced in later aircraft with electrical tachometers

aka Remote Control Turret System

The gasket between the frame and glass appears to be missing

Fuhrertochterkompass, Fl23334, German Luftwaffe Do-17 the lower center indicator displaysThis is an authentic WWII era Fuhrertochterkompass Fl23334, or repeater compass, that was installed on the instrument panel of a number of aircraft of the German Luftwaffe, such as Messerschmitt Bf 109 and Me 262, Focke Wulf Fw 190, Dornier Do 335, Junkers Ju 88 and others. The primary compass transmitted an electric signal to the repeater compass to indicate the direction of travel. The knurled dial around the face can be rotated by the pilot or crew