Germany, Kriegsmarine. A U-Boat War Badge, By Schwerin Hold and the shamrock shaped ends

and the shamrock shaped ends have three raised details

focusing on maths

He was the 583rd recipient of the Oak Leaves

with one dated August 1939

constructed of “Flaschengrün” bottle green wool

Germany, Kriegsmarine. A U-Boat War Badge, By Schwerin Hold and the shamrock shaped ends(U Boot Kriegsabzeichen). Re Issued on 3 October 1939 by Karl Dnitz. (1939 1945 Issue). Constructed of gilt tombak in the shape of a horizontally oriented oval laurel wreath, with a national eagle placed on top of the badge clutching a mobile swastika, and with a submarine superimposed in the center of the badge, the reverse with a block hinge and tapering vertical pinback meeting a flat wire catch, unmarked but with the physical characteristics of