You help appreciated. I've got a postwar Winchester Model 61 .22 S.L. or L.R. with a grooved receiver and 10" pump arm. The SN is 313856. Santa Claus left it under the tree in the late 1950s. It has blueing wear from the pump arm both open and closed. There are very slight dings in the stock. Can you help with general value and the bigger question of what it and it's consecutive serial number be worth in the same general condition? Thanks.