Chronomètre FB 3SPC.1-1


When curves consort with chronometry

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The Chronomètre FB 3SPC draws its stylistic, technical and aesthetic inspiration from a rare and exceptional creation, the No. 26 decimal watch, made in 1793 by Louis Berthoud™. Calibre FB-SPC is based on a cylindrical balance-spring, a rare watchmaking speciality. It is the only one of its kind to satisfy the chronometric (precision timekeeping) criteria of the COSC: ISO 3159 certification made possible only by the precision adjustments performed by the Manufacture's watchmakers.

The FB 3SPC.1-1 is equipped with an 18-carat white gold case framing a black-varnished minutes track with black-rhodium treated visible movement components.

The round case recalls the curves of pocket watches made by Louis Berthoud™.



Appearing at 9 o'clock, the three main escapement organs – the balance-wheel, pallet-lever and escape-wheel – are thus individualised, distinct and prominent. This ample space 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 water-resistant porthole created in the case middle.


Its round case, available in 18-carat white or rose gold, recalls the curves of pocket watches from the early 19th century, such as the decimal watch No. 26, made in 1793 by Louis Berthoud™ and now on display within the Chronométrie Ferdinand Berthoud heritage collection in Fleurier.


The mainplate is placed at the heart of Calibre FB-SPC and the components are assembled on either side of it. On the dial side, a close-knit array of six bridges traces curves and lines directly inspired by the work of Louis Berthoud™. They are echoed on the back by ten other bridges forming an intimately juxtaposed mosaic.


    • Material : Case in ethical 18-carat white gold
    • Case Type : Round with a transparent sapphire ‘porthole’ at 9 o’clock
    • Diameter : 42.30 mm
    • Thickness : 9.43 mm
    • Water resistance : 30 m
    • Glass : Domed sapphire crystal glareproofed on both sides
    • Case-back : Exhibition back in ethical 18-carat white gold fitted with a glareproofed sapphire crystal pane
    • Crown type : Ethical 18-carat white gold
    • Calibre : FB-SPC
    • Type Of Movement : Mechanical with cylindrical balance-spring
    • Type Of Winding : Hand-wound
    • Diameter : 34 mm
    • Тhickness : 6.84 mm
    • Lines : 15'''
    • Number of jewels : 47
    • Frequency : 21,600 vph (3Hz)
    • Power reserve : 72 hours
    • Number of components : 230
    • Certification : Chronometer-certified by the COSC
Dial and Hands
    • Dial : Sandblasted nickel silver with black rhodium-treated
    • Black-varnished inner bezel ring for the hours and minutes and seconds subdial, in sandblasted brass
    • Gilded, facetted and skeletonised dagger-shaped minutes hand
    • Gilded seconds hand with counterweight
    • Gilded arrow-shaped power-reserve hand
Functions and Display
    • Central display of the hours and minutes
    • Seconds at 6 o’clock
    • Power reserve at 2'o'clock
Strap and Buckle
    • Strap : Alligator leather
    • Buckle : 18-carat white gold pin buckle

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