Patek Philippe 5370P Service & Repair Guide

Key Points from the Discussion

• The official Patek Philippe distributor in Hong Kong suggested moisture as the cause and quoted a significant fee for service and even for return shipping if the quote was declined, raising concerns about transparency and customer service.
• One collector suggested bypassing the distributor and contacting Patek Philippe directly in Geneva, especially given the watch's limited wear and the unusual nature of the damage.
• Another member shared a similar experience with their 5370P, where Patek Philippe replaced the crown and pusher under warranty due to potential airtightness issues, suggesting a possible manufacturing defect related to sealing.
• Several contributors debated the cause, with some suspecting lubricant leakage from the movement due to the location of the blemishes, while others strongly leaned towards moisture intrusion.
• An expert explained the intricate process of enamel dial creation, involving multiple firings at high temperatures, making the idea of simple moisture damage or lubricant migration seem less straightforward without a sealing defect.
• A collector with experience in Patek Philippe service noted that a new dial alone could cost around $2000, with a standard grand complication service adding at least another $2000, making the quoted $4000 for a full service plausible for moisture damage.