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Most Complicated Wristwatch Ever: Patek Philippe’s Grandmaster Chime Ref. 5175

Patek Philippe outdid itself.

No, this is not a new offering from the eminent Swiss marque. But we thought it was as good a time as any to pay tribute to the sheer genius and incredible artistry of a brand that dared to do the impossible—fit 20 amazing complications into a wristwatch.

Launched in celebration of Patek Philippe’s 175th anniversary in 2014, the Grandmaster Chime Ref. 5175 doesn’t just sound the hours; it also sounds the date. And it features a grande sonnerie. With triple strike. PLUS, the watch is double-sided. And that doesn’t even scratch the surface of what the watch can do.

In case you’re wondering, the Grandmaster Chime is powered by the manual-winding Calibre 300 which comprises 1,366 tiny parts that take weeks to assemble. Equipped with six patented innovations, the watch is Patek Philippe’s most complicated wrist ticker ever and only seven have been made. But there's only so much we can convey in words; this stunning masterpiece has to be seen in all its glory. So take a seat, grab your coffee and marvel at the process of a making a Grandmaster Chime from start to finish:

Ex Managing Editor

Like most people these days, Melissa tells the time with her phone. She considers serious timepieces works of art and thinks the perpetual calendar is the handiest complication to date (pun not intended). She's also a Grammar Nazi but promises not to judge if you can't tell the difference between "guilloche" and "guillotine".