Introduced circa 1881 this cartridge remained in production until WW2. It is the German equivalent of the British English 500 2-1/2″ foil case Boxer of which drawn cases of English manufacture are unknown. This calibre was likely introduced by Roth and loaded by Keller and until at least 1940 by Hirtenberger. It was also produced in Czechoslovakia but unusually it was not produced in Germany. (Dixon Ref. EXP35).