Don - Neat Cartridge Case Head. Have seen a few others that are over 50 to 70 years old...
Perhaps the most unique is Archery Hall of Fame Inductee, Karl Palmetier's circa 1930s, .30 Caliber, Cartridge Case, 5-Barb Broadhead. It is shown at the bottom of page 22 in "Broadheads 1871-1971 Identification and Rarity Guide, Second Edition".
Palmetier's head was a legitimate broadhead that he mounted on an arrow and used for shooting fish. It is actually one of the most functional old fish broadheads ever made. It is also one of the many favorites in my collection.