Every Official Rolex Retailer and Rolex affiliate is authorised to receive your Rolex watch for servic-ing. Upon receiving your watch, a member of staff notes any requests you may have. The watch is then sent to a watchmaker.
Rolex watch servicing procedure at Unowatch
The case back is then screwed down, and your watch undergoes another Rolex-specific test lasting at least 24 hours to verify the performance of the movement over time.