Antiker Dosenöffner Bully Rindfleisch Gusseisen Stierkopf Arbeit 1930'
This is a "Bully Beef" can opener, a type of cast-iron can opener dating back to the late 19th and early 20th centuries. These tools were notably used by soldiers during the First World War to open tins of bully beef, a type of corned beef.