This is an aluminum WH (Heer) ID-disc (Erkennungsmarke) as intended for a member within the '1.Sch.Ers.Kp.73' - '1. Schützen-Ersatz Kompanie / Infanterie Ersatz Bataillon 73'. The disc also bears the soldier's blood-group (type: 'O') which has been clearly imprinted on the obverse of the disc. The disc is complete with its original carrying cord. Nice original ID-disc in good used condition!