Grandmaster Chime Ref 5175 (2014)
Patek Philippe’s most complicated wristwatch
Price: CHF2.5 million
Patek Philippe has played a lead role in the last 175 years of Swiss watchmaking history. And to commemorate this milestone, it introduced a collection of limited edition anniversary watches in 2014, including the star piece: The Grandmaster Chime Ref 5175, one of the world’s most complicated timepieces. It holds six different patents, is Patek Philippe’s first double-face reversible wristwatch and sports a 47.4-mm rose gold hand-engraved case that can be worn with either dial facing up. One dial side focuses on the time and the sonnerie, while the other showcases a full instantaneous perpetual calendar with a four-digit year display. Changing the face is incredibly straightforward, thanks to a clever reversing mechanism in the lugs of this user-friendly timepiece. This highly complex 1,366-part manually wound movement is powered by four spring barrels and boasts 20 complications, including grande and petite sonneries, a minute repeater, a second time zone with day/night indicator, power reserve indicators, moon phase display, three strikework displays and two patented world premieres: A time-striking alarm and a date repeater that sounds the date on demand. A product seven years in the making, it required more than 100,000 hours for development, production and assembly, of which 60,000 hours were devoted to the movement components. Only seven timepieces will be made, with one designated for the Patek Philippe Museum.