MilDiver
847
Been there done that
Serviced a40’s Calatrava by Patek.
Putting costs aside.
They will give you detailed quotation, and you can pick what you want (like polish or not).
The will fix it with spec parts, like correct crown and glass, even gold spring bars.
AND you will get a Patek document, like invoice, with all the details.
Send it w/o the bracelet.