Where was the plane flown by Kampfgeschwader 55, exclusively untill 1943, designed?
Kampfgeschwader 55:  The wing operated the Heinkel He 111 exclusively until 1943, when only two "staffeln" of its four "Gruppen" (Groups) used the Junkers Ju 88C. Heinkel He 111: The Heinkel He 111 was a German aircraft designed by Siegfried and Walter Günter at Heinkel Flugzeugwerke in 1934.
Heinkel Flugzeugwerke