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Headgear of Hitler's Germany
Vol. 1: Heer - Luftwaffe - Kriegsmarine
By Halcomb, Jill and Saris, Wilhelm P.B.R.
Descripton: Very good coverage of title of the book. The first one in a series of six books covering this subject. The part of the book concerning U-boats deals with the emblems worn on the headgear used by these men.