Patek Philippe, Devil's Fish, model: 5100R-001. Patek Philippe's first in-house rectangular movement, Cal.28-20 / 220, 29 jewels, double mainspring barrel, 240 hours (10 days) power reserve, Geneva Seal +COSC dual certification. Configuration: 18K rose gold case, 34×46mm, with lugs but no crown, dark grey sunpattern dial, rose gold three-dimensional hour markers, engraved "YEAR 2000" on the back of the watch, millennium work. Scarcity: Limited to 750 pieces worldwide. The production mold has been destroyed, and the remaining quantity is scarce. Value: Millennium commemorative Edition, combining craftsmanship, history and collection value. The second-hand market is stable, with a slight increase recently.