My Great-Uncle left me an L.C. Smith 20 guage side-by-side. Markings on the gun are "L.C. Smith Ideal Grade" on the right barrel, and "HUNTER ARMS CO. INC. MFR'S FULTON, NY,U.S.A.". The serial number on the gun is Fw E1928xx, with an I stamped below it. How old is this gun, and what is it's approximate value? Any other info would also be appreciated.