Have you tried searching for acme shotgun and see what you get.During the days that many shotguns were imported and made in this country many different names were used that were made by the same company.Also try comparing the shotgun of other shotgun pictures that has a know maker.For instance I own a sixteen gague side by side that bears the name Central Arms which was one of the names the the Sapliege hardware company used.Stevens 311 parts work perfectly on it.