FB 1R – Edition 1785

Through its design and its COSC-certified calibre with tourbillon and constant force, the 1785 edition of the FERDINAND BERTHOUD FB 1R Chronometer is inspired by Ferdinand Berthoud’s Marine Chronometer No. 7. Integrated within a pillar-type architecture, the fusee and the barrel of the transmission system are reversed and suspended. The 280 mm long chain connecting them supports a tension of three kilos exerted once winding is complete.

The result of complex scientific calculations, the power reserve consists of a unique mobile cone connected to flat levers on the dial side and reflects the barrel’s various states of winding and unwinding with unparalleled precision. This exceptional timepiece is offered in a numbered five-piece limited edition, carved in bronze, each with a different patina to evoke the passage of time.

  • Reference
  • FB 1R.5-4
  • Limited edition
  • 5 unique pieces
  • Case material
  • Patinated Bronze
  • Case diameter
  • 44 mm
  • Case thickness
  • 13.95 mm
  • Caseback
  • Sapphire
  • Water resistance
  • 30 metres
  • Movement
  • Tourbillon with fusee-and-chain transmission
  • Winding
  • Manual
  • Power reserve
  • 53 hours
  • Frequency
  • 21.600 v/h (3 Hz)
  • Components
  • 1158
  • Dial color
  • Golden
  • Dial material
  • Nickel silver
  • Dial decoration
  • Vertical satin-finished Hand chamfered cut-out
  • Functions
  • Hours
    Minutes
    Seconds
    Power Reserve
  • Bracelet material
  • Alligator leather
  • Buckle type
  • Folding clasp
  • Buckle material
  • Titanium