Well, I was kind of thinking the same thing Joe. But what keeps me see/sawing back and forth are a couple of things.
If it was a replica, usually they say, "Uberti", "Taylors and Co", "Dixie Gun Works", "Cimarron" somewhere.
But then, if it was a counterfeit, that would be gone.
Also, for a 160 yr old black powder gun, those nipples are very very clean (no wise cracks guys, please). That is the hardest part of the gun to get clean. So that kind of makes me suspect.
Those grips are the current color of the Italian breed as well.
I would think that the brass would be a bit nicked up for gun that age, since that is a soft metal.
Maybe a complete tear down would reveal more clues.
These are just red flags looking at a picture. I am not there.
If I were looking to buy, I would definitely have an expert look at it first.