Das ist auch ganz interessant:

TS:

“How come this one that I just started selling a few months ago is already in the secondary market?” That means that one of the retailers, including our own store in Geneva, has sold the piece to the wrong person. Someone who [flipped] it.

I’m buying those pieces back. Not all of them—there are too many. But we are buying a couple hundred pieces to check that. And then when I have it, I check the number. This number allows me to know that, OK, I sold it to Patek Philippe Rue du Rhône, so go to Rue du Rhône and ask my store manager, “Explain this to me. This watch, I bought it on the secondary market. To whom did you sell this watch?”

And you know, the retailer sometimes didn’t do anything bad. He says, “But I sold it to this gentleman. I never had a problem with him.” He can be also tricked, you know? But sometimes, no. And if I see that this retailer doesn’t play the game well—are you ready to lose Patek as a partner [to make money on] just one or two watches? OK, then we will close you.