Germany, Kriegsmarine. A Submarine War Badge, by E. Ferd. Wiedmann
(U-Boot-Kriegsabzeichen). Constructed of gilded feinzink, presenting as an oval oak leaf wreath with a central U-Boat, topped by a Kriegsmarine-style German national eagle clutching a mobile swastika, reverse plain with a barrel hinge and vertical pinback meeting a flat wire catch, marked below catch by stylized "W" (for E. Ferd. Wiedmann, Frankfurt am Main), measuring 48.0 mm (w) x 40.66 mm (h) and weighing 18.6 grams, vaulted, scarce maker, in extremely fine condition.

