Kriegsmarine U-Boat War Badge (U-boot-Kriegsabzeichen). The U-Boat War Badge was instituted by Oberbefehlshaber der Kriegsmarine und Großadmiral: 'Erich Raeder' on 13 october 1939 for award to all ranks of U-Boat personnel who had served on at least two sorties against the enemy or were wounded in action. The late war badge is made of zinc. The badge is not visible maker marked but can be attributed to production by the company of 'Wilhelm Deumer' from Lüdenscheid. The badge is having a functional pin & catch. Nice original badge in good used condition!