Ferdinand Berthoud Chronomètre FB 3 “Only Watch”

Technical specifications


  • Hours
  • Minutes
  • Seconds
  • Power Reserve


  • Manual Winding
  • Chronometer (Cosc)
  • Swiss Made


  • Round
  • Bronze
  • 9.43mm
  • 42.30mm


  • Sapphire


  • Pin Buckle
  • Titanium


  • Alligator
  • Green


  • 2023

Official description

The Chronomètre FB 3 “Only Watch” is the result of several months of preparation and testing to obtain this unique patinated bronze case. The colour and nuances are unprecedented and evoke to the discerning gaze the patina that naturally develops on the copper alloys of the precision and navigation instruments supplied by Ferdinand Berthoud during the 18th century. This patina symbolises the passage of time and celebrates an anniversary: in 1753, exactly 270 years ago, Ferdinand Berthoud received the ‘Master Watchmaker’ title, at the age of just 26. Beating inside the FB 3 "Only Watch" model is the world’s only calibre with a cylindrical balance-spring officially chronometer-certified by the COSC, a clear tribute to the quest for precision initiated by Ferdinand Berthoud. Many months of research, testing and fine-tuning were necessary to define the number of coils and the geometry of the terminal curve at the attachment points. The ample space at 9 o'clock dedicated to the regulating organ enables its operation to be admired in full, and the cylindrical balance-spring to be seen beating throughout the three-day power reserve, including through a large porthole created in the case middle at 9 o'clock.

CHF 160,000 – 180,000
USD 176,000 – 198,000
EUR 164,800 – 185,400