Ya know my gun may have been made in 1956 or slightly before, I bought it new from an army navy surplus store in my little home town in 1958-1959, I remember the old guy that ran the place had a lot of shotguns, rifles and handguns in stock. I paid $25.00 for it, and my Dad had to come up with the sales tax, which at the time was if I remember right was right around .35 cents or so.
Further we could go in there without a parent and buy shotgun shells by the pieces if we didn't have enough money for a full box. Man those were the days.