Rare color image of 6.Staffel / II.Gruppe / Schlachtgeschwader 1 (SG 1), January 1943, displaying 13 new Focke-Wulf Fw 190 A-5/U3s based on the Eastern Front at Deblin-Irema, Poland. This version of the A-5 carried additional protective armor and was capable of carrying 4 x 50kg bombs under the wing. Later, it was redesignated as the F-2 ground attack model. In this photo, although they carry the black triangle at the rear of the fuselage, they have no letter codes. It is possible that the photo was taken soon after the aircrafts were delivered to the unit.
Book "Focke-Wulf Fw 190 Owner's Workshop Manual" by Graeme Douglas