Welcome!
Congrats, the Master Compressor Memovox is a very nice choice!
For me it's my go to watch, my beater...
As for the bezel crown, no it should not be hard to turn.
Infact mine is almost too smooth so I turn the bezel with my wrist...
I would ask a professional have a look.
Best
Blomman
PS. Please feel free to share some pics of your and your wifes watches!