IWC

So, I'm contemplating sending my vintage Mark XII to the Richemont center here in the U.S. for a service, but really, really concerned about them trying (insisting?) on replacing the original, pristine tritium hands with replacement luminova ones and the ...  

Sent my 3706 in a few years back. Spelled out no replacements/no polish and they respected my wishes. ...  

I assume all the work was done there. Wish I could remember how long it took, but it wasn't anything crazy.

It didn't have tritium in the first place, but they did exactly what I requested and refrained from exactly what I requested they refrain from. It was quite refreshing!

glad to see IWC appreciating the vintage legacy of the brand... that wasn't always the case! ...  

They seem to respect fish crowns, because I never specifically asked to preserve them. That has been my experience with multiple services / multiple watches. However, I did once request to have tritium parts on a 3705 returned after updating dial and hand... 

and they left the fish crown and patina dial with a bronze hued date frame. My only gripe is I had a Ti Aquatimer GST and the lug pins were replaced with polished steel, not blasted titanium. They denied the pins were different which was blatantly obvious... 

You can check with Jack Freedman. He services IWC and can get parts. He took care of my Ingenieur Ref. 3521 without changing anything on the dial or crown. https://www.superiorwatch.com/Pages/about.html

Always great service and no issues with unwanted part replacement or polishing. Good luck! Brian

provided very detailed instructions which he said will be respected. Should have it back in late January, so I’ll provide an update - thanks +++