Damian, I think the guys sent you pics so that you could see the variety of clothing and equipment that the German Sailor wore. In the specific case of your bust, a U-Boat crewman, he appears to be wearing a sweater, a leather jacket and finally a life preserver (the brown quilted looking vest). He also wears a civilian scarf. What gives this guy away as a U-Boat crewman is the stylized swordfish badge on his cap. Hope this helps.
Joe