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, one of the two versions available, is equipped with an 18-carat white gold case, 2N pale yellow gold movement components and an eggshell-coloured dial in sandblasted silver-toned brass.
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.
Powered by a mechanical movement featuring a cylindrical balance-spring and chronometer-certified by the COSC, the Chronomètre FB 3SPC approaches the core theme of precision from a new angle. This collection takes its cue from the refined design of pocket watches from the early 19th century.
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