Wells Fargo did indeed buy different type guns for their agents I have a Colt Police Positive Special marked "W F & Co" on the butt. Fortunately this gun lettered as being sold to Wells Fargo by Colt and is so stated on their letter to me.
I have no idea as to how you would go about authenticating a Manton shotgun.
As far as Pawn Stars goes it has little to do with reality. The have more "experts" on call than most museums. If I had to rely on this much outside expertise when I owned and operated my business I'm sure I would have gone broke. I treat this show as entertainment nothing more.
Jim
