The two bulls head openers were manufactured circa 1875. Not sure about the other two, but they're at least 100 years old.
Antique Tin Can Motor Automotive Soldax-Bloc Welding RIGUPAR c.1950
4nDfUJ - Small Sand Casting Design Tin Can - Vintage - 4 CM
Original Pre-1945 Tin Botanical Drum Tin Toy Tin Can Burg Rheinstein
Vintage Pharmacy Medical Gauze Tin Botiquin TGS Gauze Tin Can 80s Spain
Antique RIGUPAR Automotive Engine Soldax-Welding Block Tin Can c.1950
Hyman custom bilt auto top patching unit antique Tin Patch Ford Tire Rubber Can