Helping a buddy identify his Grand Dads L.C. Smith sxs. It is a 12 Gauge with 30 inch Damascus barrels with patterns Almost looks like scrolling) Dual bead sights SN is a four digit 11xx. Barrels receiver and for end metal all have same 11xx number. Receiver under barrels marked with a feint A then a clear S1E Would like to know what grade it is.