Insignia of the German Armed Forces in WWII.
Own work using: German Junkers Ju 52 Messerschmitt Me-262Own work and also based on Page 49 of

 G. G.Lepage, Jean Denis (2009)       Aircraft of the Luftwaffe 1935–1945: An Illustrated History, McFarland &amp; Company, p. 402  ISBN:  0786439378.