Chronomètre FB 2RSM.2-1

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Chronomètre FB 2RSM.2-1

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A regulator with deadbeat seconds

The Chronomètre FB RSM reinterprets the architecture and design of the Marine Clock no. 8 produced by the master clockmaker in Paris in 1768. Only 20 movements will be produced, and several key exterior elements can be chosen by the collector. They may be fitted inside a round or octagonal case. The FB 2RSM.2-1 with a round 18-carat rose gold case and 18-carat rose gold satin-finish dial with black rhodium treatment is one of the variations offered by the manufacture.

Chronomètre FB 2RSM.2-1

Features

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Ferdinand Berthoud devoted his life to experimentation and to passing on his knowledge by publishing numerous specialised works and training apprentices. The Chronomètre FB RSM continues this tradition by enabling a young watchmaker from the University of Neuchâtel to participate in the development of the movement as part of his graduation project.
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The creation of a deadbeat seconds mechanism is a major challenge for any watch that claims to earn chronometer certification. Since the regularity of the torque is the essence of a constant-force calibre, interrupting its flow 60 times a minute without compromising its linearity is a true technical feat – which is why the majority of deadbeat seconds movements fail to achieve COSC certification.
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The hours are read off via a rotating disc at 2 o'clock; the minutes are indicated by a facetted and skeletonised hand on the subdial at 12 o'clock; and, as a symbol of precision, the seconds hand occupies a central position on the watch face.

Chronomètre FB 2RSM.2-1 in details

Case
Case
    • Diameter : 44 mm
    • Thickness : 14,30 mm
    • Water resistance : 30 meters
    • 18-carat rose gold dynamometric crown 
    • Round case fitted with a transparent sapphire porthole
    • Screw-in case-back with glareproofed sapphire crystal
    • Domed, arched sapphire crystal, glareproofed on both sides
Movement
    • Limited production (encompassing all types of case) : 20 movements
    • Calibre FB-T.FC.RSM
    • Mechanical hand-wound movement
    • Tourbillon with constant force device with fusee-chain transmission
    • Diameter : 37,30 mm
    • Thickness : 9,89 mm
    • Lines : 15 ¾
    • Number of jewels : 60
    • Frequency : 21 600 vph (3 Hz)
    • Power reserve : 53 hours
    • Number of parts : 1169
    • Chain length : 285 mm
    • Chronometer-certified by the COSC
Dial and hands
    • Openworked regulator plate (dial) in vertical satin-brushed and hand-engraved 18-carat gold with black rhodium treatment
    • 18-carat rose gold minutes hand
    • Gilded steel fixed hours pointer
    • Gilded central seconds hand in titanium
    • 18-carat white gold power-reserve hand with blue CVD treatment 
Functions and display
    • Indication des heures sur disque saphir à 2h
    • Indication des minutes à 12h
    • Secondes mortes au centre
    • Réserve de marche au dos du mouvement
    • Stop seconde
Strap and buckle
    • Hand-sewn rolled-edge alligator leather strap
    • 18-carat rose gold pin buckle 
Chronomètre FB 2RSM.2-1 Chronomètre FB 2RSM.2-1
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