Cartier Portico Mystery Clock No. 3 – Art Deco Masterpiece at Phillips Geneva Auction XXI

Discover the story behind one of the rarest and most mesmerizing horological masterpieces ever created: the Cartier Portico Mystery Clock No. 3. This legendary Art Deco clock, crafted in 1924 and featuring unique rose quartz columns, a floating rock crystal dial, and diamond-set dragon hands, is a true marvel of design, engineering, and artistry. Only six Portico Mystery Clocks were ever made, and No. 3 stands apart for its exceptional craftsmanship and history.

Join us as we explore the origins of Cartier’s mystery clocks, the genius of Maurice Coüet, and the Art Deco innovation that captured the imagination of royalty, collectors, and connoisseurs. Learn how this museum-quality clock, exhibited at the 1925 Exposition des Arts Décoratifs in Paris, has remained hidden in a private collection for decades—and why its appearance at the Phillips Geneva Watch Auction XXI is a once-in-a-generation event.

Whether you’re passionate about fine watchmaking, Art Deco design, Cartier’s legendary history, or simply love stories of lost masterpieces resurfacing, this is a moment you can’t miss. See the clock in person at the Hotel President Geneva from 7-12 May ahead of The Geneva Watch Auction: XXI (10 & 11 May).

Auction Details:
Phillips Geneva Watch Auction: XXI
May 10 & 11, 2025
Hotel President, Quai Wilson 47, Geneva

Learn more and view the full catalogue at Phillips.com

Chapters:

0:00 Introduction to the Cartier Portico Mystery Clock No. 3
0:28 Imagining the history and life of this antique clock
1:16 1924 and a world of Art Deco
1:38 The one and only with square, rose quartz columns
2:00 Rock crystal dial with mysterious floating diamond-set hands
2:18 The mystery explained
2:50 Chinese symbolism
3:14 1925 Exposition des Arts Décoratifs, Paris
3:28 The re-emergence of this incredible clock
3:48 Original presentation case and numbered key
4:14 Conclusion