Would need more and better photos.
At first glance that looks like a redial. Crown is a replacement ? Seems slightly different in color than the case and possibly bigger than what it should be. What about the hands ? Wouldn't be surprised if those are non-genuine either.
I don't know the movement so can't tell about that one. Seems alright but we'd need to compare it to others...
The case clamps are installed wrong. They should go inside the case so to speak which is actually a retaining ring that can come out with the whole movement I believe.