Howdy
Not confusing at all.
New Model Number Three.
Russian Model.
Completely different grip shapes.
And despite how much I respect Ian, he is incorrect about the White patent. Smith and Wesson did not own the patent, White refused to sell it. However he did make them sole licensees, so they could build revolvers with chambers bored through the cylinder.
Anyway, I just took a look at Numrich Gun Parts and the only parts I saw for S&W top breaks were a couple of 38 caliber barrels, not suitable for a large frame #3 Top Break.
H.K.: They are probably replacement grips, hence no S&W logo on the grips. I have seen lots of European knockoffs of S&W revolvers over the years, and none of them look as authentic as Bowhunter61's revolver. I think it is the real thing.
Sorry, but I cannot help much with a source for parts.