Here is something you don’t see every day. In fact, it might be unique.  This cap started life as a standard issue, Soviet enlisted man’s Pilotka or side cap.  Falling into German hands, this cap has been dyed blue and pressed into Luftwaffe service.  In addition to the blue dye job, this cap has had a Luftwaffe cap rosette and flight/para yellow soutasche added.  The blue dye has taken well to the once gray interior fabric, but the exterior shows some minor fading of the dye.  The interior is quite dark, but a factory mark, 1941 date, and a 54cm size mark can just be made out.  A very interesting piece for your collection.