Is it a clock? Is it art? Or is it a mystery? Discover the Cartier Portico Mystery Clock — the last of only six ever created. Crafted by Cartier’s master clockmaker Maurice Couët in 1925, this extraordinary timepiece stands as a triumph of ingenuity and beauty, where innovation meets illusion. Inspired by the genius of French illusionist Robert-Houdin, these “mystery” clocks defy the eye: their hands appear to float freely, detached from any visible mechanism. Every element, from its Oriental-inspired temple columns to the exquisite rock crystal Shishi figure crowning its top, reflects Cartier’s unparalleled artistry. Once owned by the legendary Gunter Sachs — art collector, photographer, and husband of Brigitte Bardot — this clock is far more than a timekeeper. It is a symbol of artistic mastery and a milestone in horological history. This horological masterwork is a highlight of the Important Watches sale taking place at Sotheby's Geneva on 9 November. Still haven’t subscribed t...