Fuel Filler Cap, BF 109 FW 190 Luftwaffe Lancaster Also see the photo of

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-25 and others

It was they who

The knob at the top right allowed the navigator to adjust for the desired course relative to the signal received from the radio compass

Fuel Filler Cap, BF 109 FW 190 Luftwaffe Lancaster Also see the photo ofHere is a WWII era Fuel Filler Cap for the Luftwaffe's Messerschmidt Bf109 Fighter, and also used on the Focke Wulf Fw190 Fighter. Manufactured by Deutche Benzin Uhrin, stamped "DBU", "Kraftstoff" (fuel), and "Beluftungsventil" (vented). It is in good condition for such an artifact. Measures ~3 inches diameter, ~5 inches across, and ~1. 5 inches deep.