Germany, Kriegsmarine. A U-Boat War Badge, By Schwerin & Sohn certificate_of_authenticity hole at the neck end

hole at the neck end of both the board and strap for the placement around a button post for uniform attachment

one end wrapped around and riveted in place on the reverse

the obverse bearing a multi-coloured machine-embroidered shield overlaid by a bow and arrow

but of typical Vinc Mayer manufacture

Germany, Kriegsmarine. A U-Boat War Badge, By Schwerin & Sohn certificate_of_authenticity hole at the neck end(U Boot Kriegsabzeichen). Constructed of gilded tombak, the obverse consisting of an oval laurel leaf wreath, joined together at the bottom by ribbon, topped by a Kriegsmarine eagle clutching a wreathed mobile swastika, overlaid by a central U Boat set over top a hollow background, the reverse with a block hinge and banjo style pinback meeting a flat wire catch, unmarked but with the physical characteristics of manufacture by Schwerin & Sohn, Berlin,