Gorgeous find and I'd be happy to own it, factory or not.
My first decent shotgun was an old Winchester 1300 ?Black Shadow?. Economy model for sure, but I was pretty proud of it and shot a lot of animals with it--anything that moved in NB, except moose. Deer, bears, ducks, partridge, etc.... It's been passed around various family members ever since. Everyone who gets their hands on it finds it's a pretty decent, quick-shooting, quick-handling gun for the weekend warrior types.
I'd love to have another that was set up with the upland stock and a shorter barrel with IC choke. Would be deadly for black duck busting in the creeks.