Chronomètre FB 2RE.2


An unprecedented mechanical feat

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In 1770, following the success of the sea trials in 1768-1769 of Marine Clocks No.6 and No.8, Ferdinand Berthoud was awarded the title of "clockmaker and mechanic by appointment to the French King and Navy". The Chronomètre FB 2RE.2 reinterprets the architecture and design of the Marine Clock No. 6. This limited edition of 10 pieces features a round 18-carat rose gold case, fitted along its middle with a large panoramic window. It frames a black grand feu enamel dial with a complex two-tiered construction and an exceptional mechanism: the emblematic fusee-and-chain transmission combined with a one-second remontoir d’égalité mechanism.



The FB-RE.FC calibre, in addition to the constant-force mechanism, is equipped with a one-second remontoire visible on the back of the movement. It is one of the most complex torque regulation systems in the history of time measurement.


The case of the Chronomètre FB 2RE picks up the shape of Marine Clocks and this modular construction. The movement is installed in a cylindrical container of 44 mm in diameter and 14 mm thick made of 18-carat gold. A large panoramic window appears at 10 o'clock along the case middle in a screw-down frame and reveals the movement's pillar-type architecture, as well as the barrel and its chain.


The escape-wheel pinion is connected to the stop wheel and marks off the seconds. The entire assembly is connected to the central seconds hand and enables the Chronomètre FB 2RE to display true seconds, or deadbeat seconds, like marine chronometers or regulator-type longcase clocks.


    • Material : Round case and lugs elements in 18-carat ethical rose gold
    • Case Type : Round case fitted with a transparent sapphire “porthole”
    • Diameter : 44 MM
    • Thickness : 14.30 MM
    • Water resistance : 30M
    • Glass : Domed, arched and glareproofed sapphire crystal
    • Crown type : Dynamometric crown in 18-carat rose gold, with black ceramic medallion
    • Screw-in case-back with glareproofed sapphire crystal
    • 10-piece limited and numbered edition
    • Calibre : FB-RE.FC
    • Type Of Movement : Mechanical movement with manual winding, constant force with fusee-and-chain transmission and remontoir d’égalité
    • Diameter : 37.30 MM
    • Тhickness : 9.37 MM
    • Lines : 16 ½
    • Number of jewels : 58
    • Frequency : 18 000 a/h (2,5 Hz)
    • Power reserve : 50 hours
    • Number of components : 1200
    • Chain length : 285 MM
    • Certification : Chronometer-certified by the COSC
Dial and Hands
    • Dial : Split-level dial in black grand feu enamel, white grand feu enamel hours & minutes track
    • Gilded titanium central seconds hand
    • 18-carat blued (CVD) gold arrow-shaped power reserve hand on the back of the movement
Functions and Display
    • Display of the hours, minutes and seconds in the center
    • Power-reserve on the back of the movement
    • Time-setting with stop-seconds device on the balance
Strap and Buckle
    • Strap : Hand-sewn rolled-edge alligator leather strap
    • Buckle : 18-carat rose gold pin buckle