Itt a hivatalos válasz a Rolextől, ha ezzel tudtam segíteni:

To guarantee continued accuracy and waterproofness, Rolex recommends that you periodically return your watch to an Official Rolex Retailer or Service Centre for professional servicing. It is recommended to service your Rolex approximately every 10 years depending on the model and real-life usage.

Ha jól működik, pontos, nem kell elkapkodni, szerintem.