
Rolandc shares the return of his Patek Philippe Ref. 3940 from service, sparking a community discussion on maintenance schedules, service center efficiency, and the enduring appeal of this classic reference. This post offers valuable insights into the practicalities of owning and maintaining a perpetual calendar Patek Philippe.

What a classy classic ππππ, a timeless beauty. Wear it in the best of your health !
May I ask how long the service took and when was the last time you had it serviced? Just curious on the maintenance schedule of one of these quintessential Pateks
3940 is not anymore in PO catalogue since long but the 240Q caliber inside is still in production and widely used so can be serviced with no major problems. Weβll see what Roland says...
...gave me the impression that they were the typical sunk sub counters of the fist generation. Wrong assumption π€
I have seen one of these on Philippe Sternβs wrist a few times so you are in good company. Glad your baby is back all serviced and ready for the next few years service. Enjoy. Miles.
Previous owner service it 8 years ago. But generally for my watches, I send them for service in between 5 to 7 years. Watch with more wrist time, I usually send in about 5 years as per manufacturer recommendation.
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