Why are Patek Philippe watches so valuable in the auction world?

Regarding vintage and second-hand watches, there are only a few brands that manage to stand out in terms of holding value or even increasing it. One of these brands is Patek Philippe; indeed, it has been the superstar of the auction world for many years, setting record after record. We talk with Aurel Bacs, watch specialist and famous watch auctioneer, about why Patek Philippe watches are so special and what you should pay attention to if you are looking for one.