Sorry for a late reply & possibly hi-jacking the thread! My only excuse is that the four-year old kid is a master when it comes to negotiating how to spend the evening ... and I'm ... not.
OK. Two recent purchases, and two challenges. Vintage Citizen's not my home turf, so please advice if I bought crap. Liked them though, and I knew they were interesting!
... a 62-6198 and a 62-5370 ... I've managed to get hold of aftermarket/OEM inserts and a crystal for the 6198.
However, the 5370 has got the crown from hell, I will not dig deeper into it at the moment, but the inside does look pretty OK:
The crown in question -
... not original I'd say, :undecided: and it does not grip the threads on the case but stays "open". So the worst case (no pun intended) scenario is to take away the crown tube (if ruined) and fit a generic crown (nightmare) ...

hence my interest in sourcing parts and any kind of advice!
Any thoughts?
... and thank you in advance,
//Petter