I was in error about the interchangeable parts, he was referring to a Rolex copy he has, when he said that, My mistake. He talked so fast I got confused.
I now have the watch & it has the Swiss ETA Automatic movement.It is pretty heavy, and is in pristine never worn condition. I do have a couple of the cheaper fakes (Brietling) and they are no comparison to this one in quality. I also bought 4 other fascinating watches from him (not fake) which I will share at a later date.
Thank you for the support, I was feeling very guilty for wanting it!