German Hirschfänger with a
concealed flintlock pistol, circa 1750,
Wikipedia: "The hunting dagger German Hirschfänger, or deer catcher is a 20 – 30" long double-edged stabbing hunting knife, used to kill deer and boar. It was a weapon mainly used in the fancy hunts of the German nobility." Only the nobility had the hunting privileges.
the dollar is only for size comparison
German hunting knife with a concealed flintlock pistol. The hilt is staghorn, the blade is 14", the caliber is .34, the barrel length 4½", no markings as rather common at the time. A very decorative weapon worthy worn by a duke, in good working order and fine condition. $5,500.