No disrespect..but two points:
- that Rad has a closed caseback, so who cares if the movement is engraved or not?
- if your watchmaker can't see that he has an Asian copy of Unitas when working on it, you need to find another watchmaker, and quick. If you ever try your luck and work on disassembly of Asian copy vs Swiss, and then try to put them both together, you will know what I mean. I am not watch smith by any degree of imagination, but I tinker enough with unitas movements to be able to tell the difference without any issue, unless it is swinese etc.
As others said, just get a replacement movement for $50 or better still, get the whole new watch and keep this one for spares as with reps you will def need some sooner or later...this is still 800$ cheaper as compared to Panerai doing service on gen version of that watch.