It is because of these copies, from countries that did not honor copyright, or intellectual property in general, that S&W began with the "Marcas Registradas" rollmark on their revolvers.
It was a huge problem for many decades.
Anyone who thinks "America was never great", needs to be shown something like this to underscore the point of all the great innovations, ideas, and products that have come out of this country since it's inception, only to be absconded elsewhere, "usually" in much inferior form. (Gotta give some wiggle room for Korth and Manhurin, ha!)
But, it would be an interesting learning experience to do a side by side comparison with, say, a pre-war long action M&P: Maybe, slow working of the action, with sideplate off (don't drop the hammer) while observing the lockwork.
Jim
PS: I'd give that thing a thorough going over before even thinking of chambering a live round. The headspace alone looks suspect.