L.C. Smith only produced two models at the time your gun was manufactured; a hammerless double barrel shotgun, and a hammerless single barrel trap gun. The grade designation of your gun is "Field"; and that grade designation should be stamped atop the barrel. As FYI, Marlin Firearms, noted mostly for the mass production of lever action rifles, has always utilized (at least prior to their recent Remington acquisition of Marlin) an "A" suffix to create a unique serial number whenever a number was accidentally duplicated. I don't believe that such was ever the policy of Hunter Arms, and actually have in my possession a copy of a shipping ledger page from 1895 where the same serial number was assigned to two totally different Grade A-2 guns.