Patek Philippe is one of the world’s top luxury watch brands, so be prepared to see the name many times on this list. First up, this ultra-rare Patek Philippe world timer—one of only four in existence. In fact, only two versions of the timepiece have ever appeared at auction.

This one is crafted in rose gold with an elegant and highly distinctive guilloché patterned dial. One of the first Patek Philippe creations to incorporate the brand’s dual-crown system, you use one crown to wind the watch and the other to control the city disk for the 24-city timer. The combination of polished and brushed surfaces adds to the sophisticated aura of this one-of-a-kind timekeeper.