This is a nice miniature 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 miniature badge is a 16mm version, executed in zinc, showing great detail. The miniature is not visible maker marked. Nice original miniature in very good condition!