As I said, the screws on the gun I received do go all the way through. I contacted Buffalo Arms and he checked the one he has left and they go through on that one also. They were too look into it further and let me know what they learned. The gun is marked on the barrel top Cimarron. I cannot speak as to "quality" but it sure is pretty. I will not be shooting it. I have one "shooter" and the rest are safe queens.
I cannot find another dealer that has one in stock so that they could actually look at the gun. The only stocking dealer I found was Cabela's and was told they unfortunately are not set up to do that but they are confident that the Uberti is "period correct" without protruding screws, and I could return it if it was not and they would eat the freight.
You may have answered where this Paterson came from. It supposedly is a Uberti also. see pic