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Franck Muller

Ref. 7850 CC QPB

Curvex Cintrée QP Biretrograde

A fine and attractive white gold tonneau-shaped double retrograde perpetual calendar chronograph wristwatch with moon phases and leap year indication, numbered 21

- The Franck Muller Perpetual Calendar Bi-Retrograde stands at the pinnacle of the manufacture’s technical savoir-faire, powered by the in-house calibre 5888 BR combining a perpetual calendar, bi-retrograde day and date displays, and a chronograph—an impressive convergence of high complications within a single movement.

- Its unconventional yet refined guilloché white dial is thoughtfully composed, showcasing the retrograde indications alongside chronograph registers, month and leap-year apertures, and a moon-phase display, offering both visual balance and exceptional legibility.

- A consummate expression of Franck Muller’s avant-garde spirit, this Perpetual Calendar Bi-Retrograde Chronograph unites mechanical complexity with a bold, contemporary aesthetic. Cased in 18K white gold and bearing case number 21, the present example represents a compelling opportunity for collectors seeking a legacy timepiece defined by technical virtuosity and distinctive design.

Franck Muller

Swiss | 1991

Specializing in top-quality timepieces, Swiss watchmaking company Franck Muller was founded in 1991 in Geneva. The company was named after watchmaker Franck Muller, also known as the "Master of Complications," and Vartan Sirmakes, Co-Founder and CEO of the Franck Muller Group. Shortly after graduating from watchmaking school in the 1980s, Muller was among the first to create his own tourbillon wristwatch, along with world-renowned brands Patek Philippe and Vacheron Constantin.



In addition to Muller's fine craftsmanship and intricate complications, the brand is often recognized for its modern designs and colorful flare. To date, the brand's notable lines are the Curvex, Crazy Hours, Casablanca, Conquistador, Long Island and Aeternitas, as well as Revolution2 and Revolution3.

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