We would recommend this store for you personally. The water table will also indicate barrel information. The old style shotguns end with serial number 855,000 and any number higher than that is the new style. IO found an old Ithaca Hammerless 12 gauge double barrel shotgun. The serial number possibly dates this LeFever to circa 1937. Ithaca double barrel shotgun serial number location All I can find is the Ithaca Hammerless engraving on the side and a pair of Krupp Fluid Steel stamps on the top side of the barrels.