^^^ As I wrote, he and I corresponded and I offered the data and he made the decision that it was not properly represented. Our correspondance was very cordial and he was unsuspecting that he himself had been taken when he purchased it. He had bought it based on it's appraisal paperwork from the auction house he bought it from. The Italian makers markings was the final straw. He's a good guy, an old gunsmith that is now 87 years old, specializing in making and heat treating replacement parts for flintlock rifles. Civil War era stuff is "new" to him... this was news to him, but he diligently looking into the data that I sent him and came to his own conclusion.
He's unsure what he will do now with it. Still licking his wounds. Gratefully he paid about what he was asking, not a fortune for the lesson he learned.