Does anyone know if it's possible to buy a replacement bezel to take a crystal for the rear of a Waltham pocket watch. I have a couple of watches which have nice looking Riverside movements but are nothing special and it would be cool to be able to show them off. Not to fake anything just for pleasure

You'd have to find an identical case and rob that one of it's bezel, Mike.

On the other hand, I make my own out of cases with worn or damaged casebacks. If you have one you'd like done please contact me privately at the address under my avatar.

Thanks for the info.
Just to clarify are you saying that the front bezel is exactly the same size as the rear cover.

Sometimes the threads are the same front to back; it depends on the case.