Kriegsmarine 'U-boot-Kriegsabzeichen' (U-Boat War Badge). 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. This is an early 'Buntmetall' example, complete with a functional pin & catch. The badge is not visible maker marked but can be attributed to production by the company of 'Otto Schickle' in Pforzheim and is an early pre 1941 produced piece. Nice original early badge in good used condition!