Howdy
Very nice video.
A couple of comments.
First, please forgive me for putting my school marm hat on, but the proper name for that revolver is the American Model. Yes, I know Cimarron is calling it Model Number Three, 1st Model American, but that is incorrect. Smith and Wesson built five separate models on the large #3 size Top Break Frame. The American Model, the Russian Model, the Schofield Model, the New Model Number Three, and the 44 Double Action.
What you have there is a very good replica of the American 1st Model. It is important to list the word 'American' first when describing that model.
School Marm hat off.
This is a photo of a Russian, 1st Model. Completely identical to the American Model, except the American Model was chambered for the 44 Smith and Wesson American cartridge, which used a heeled bullet. The Russian 1st Model was chambered for the 44 Russian round, which used a conventional bullet that was the same diameter as the inside of the case. (Later, the 2nd and 3rd Model Russians had the big bump on the grip and the spur on the trigger guard) Notice on this revolver there is a swell, or bump, in the frame around the trigger pin. The 1st Model American did not have that bump. You will notice on your revolver there is more of a straight line where the frame blends into the trigger guard. The 2nd Model American had a larger diameter trigger pin, which resulted in a bump around the frame just like on the 1st Model Russian. Kudos to Uberti and Cimarron for including the bug screw with the frame pivot screw. It would have been much easier to ignore that.
Early in your video you mention you think the originals had a latch under the extractor housing for removing the cylinder. That is incorrect, no S&W Top Breaks had a latch under the extractor housing for removing the cylinder. What they did have was a latch under the pivot screw for the barrel. This latch allowed the revolver to be broken open without the extractor lifting up the empties. Interestingly enough, on most of the #3 Top Breaks this function was engaged by pressing the latch in. On the 1st Model Russian, and I assume on the American Model, the latch was slid back to prevent the extractor from rising while breaking open the revolver. I would be interested to know if the latch works the same way on your replica of the American Model.
It appears to me the screw on the top strap of your revolver is identical to the originals. Removing this screw allows the small piece under the latch that retains the cylinder to be removed, so the cylinder can be removed. This screw was replaced by a knurled thumb screw on the 3rd Model Russian, and completely done away with on later #3 Top Breaks replaced by an easier way to remove the cylinder.
Rear sight and hammer, that's the way they were. I am not aware of any 'target' hammers with a wider spur ever being made for any of the #3 Top Breaks, although I suppose perhaps customs ones may have been made at some point, but that was not a factory option. As far as the rear sight is concerned, the two little nubs on top of the barrel latch were standard with all the #3 Top Breaks except the Schofield Model, it had a different rear sight arrangement.
However there was an adjustable rear sight that S&W put on some of these revolvers, but I doubt if you would like it. This is the adjustable rear sight on a target model 44 Double Action. A small blade with a small groove in it. The standard rear sight was still on the latch, but the front sight and the adjustable rear sight blade were taller so the sight picture 'looked right over' the non-adjustable rear sight. This style of sight was only adjustable for windage, not for elevation. To adjust, the two screws were loosened, then the rear sight was nudged to a new position, then the two screws were tightened again. A number of years ago Beretta was selling a replica of the New Model Number Three that had this type of rear sight. I am told the latch with sight attached could be mounted on Uberti's version of the #3 Russian revolver. I have no idea if it would fit on Cimarron's new replica of the American Model. I doubt you would like it much anyway.
Don't forget, some pretty amazing target shooting was accomplished with the relatively unsophisticated, by modern standards, sights on target versions of the New Model Number Three. I had the chance to buy this one a few years ago and I'm still kicking myself that I passed it up.
Here is the rear sight, the same as the one shown in my photo from my 44 Double Action.
The front sight was taller than the standard 'half moon' front sight and had a small bead on top. Clearly, very good eyesight was required to shoot accurately with these sights.
Anyway, thanks for the video, I hope you enjoy your new revolver.