I have a Winchester model 12 ,1949 with engraving by Neil Hartliep rt side has ducks taking flight, the left has geese taking flight in a marsh. the proof marks are on the left side of the barrel beside the 2 pin vent rib (duck bill) one white front sight and one white bead mid rib. standard trap stamped on bottom side of the magazine tube ahead of the yoke. it has an extended Winchester forearm ,beautiful walnut rollover stock. 98% wood and blue. I was wondering what the value of the gun might be.