Airspeed Indicator Fahrtmesser Fl 22231, 80 – 750 km/h Luftwaffe Sally Bomber perhaps evidence of its use

perhaps evidence of its use in the US Navy's version of the B-17

whereas the 'periscope' was inserted through a shutter mounted in the ceiling of the aircraft

The appearance of red diagonal lines indicates that the wheels are not in the locked position either up or down

in the main photo

Airspeed Indicator Fahrtmesser Fl 22231, 80 – 750 km/h Luftwaffe Sally Bomber perhaps evidence of its useHere is an original WWII era Airspeed Indicator Fahrtmesser Fl 22231, indicating speeds from 80 750 km h, as used in aircraft of the German Luftwaffe, such as the fighters Messerschmitt Bf 109, Bf 110, and bombers Junkers Ju 87, Ju 88, and Dornier Do 217. This indicator shows Fl 22231 embossed on its dial, and Fl 22230 on its rear case. The dial is clearly of the Fl 22231, so it is possible that the rear housing was replaced using that from a Fl 22230