Ferdinand Berthoud Régulateur Squelette
Ferdinand Berthoud Régulateur Squelette

Singapore, April 2023 — Sincere Haute Horlogerie (SHH) is proud to present 2 unique timepieces following a successful collaboration with Ferdinand Berthoud – the REGULATEUR SQUELETTE FB 1RS 6-4 & 6-5. Only 20 iterations of the Régulateur Squelette (RS) movement have been produced, and 2
of them have been dedicated exclusively to SHH.

Both the FB 1RS 6-4 & 6-5 have sandblasted stainless steel octagonal cases with DLC coatings fitted with two transparent sapphire portholes – and will be the only 2 models in the entire lineup to have this treatment.

The dials of these two watches are another point of interest. The openworked regulator plate (dial) for the watches are both made of nickel silver and are vertically satin-brushed. The FB 1RS.6-4’s dial is blue-CVD treated, while the FB 1RS.6-5’s is treated with black rhodium. Both watches also come with colour-matched straps.

Ferdinand Berthoud Régulateur Squelette 2

Housed inside the timepieces is the calibre FB-T.FC-RS, with a tourbillon and fusee-and-chain transmission. The calibre is the first skeleton movement produced by the Manufacture. This regulator type chronometer movement with tourbillon and fusee-and-chain transmission is the result of comprehensive technical and aesthetic developments that were inspired by Marine Clock No. 8, which was produced by the master-watchmaker Ferdinand Berthoud in Paris in 1768.

Ferdinand Berthoud Régulateur Squelette 3

Through the opening visible at 2 o’clock, a large-diameter sapphire disc is visible, with a steel fixed pointer to illustrate the hours. A facetted and open worked dagger-type hand crafted in 18-carat white gold and treated with blue CVD indicates the minutes of the hour atop a sandblasted and silver-toned dial found offset at 12 o’clock. The seconds are displayed in red Arabic numerals on a flat sapphire inner bezel ring surrounding the dial, with a bronze central seconds hand varnished in red sweeping across the dial. The bridges have been entirely designed to ensure an admirable view of the choreography performed by the imposing tourbillon carriage appearing on the dial side.

Many components feature black PVD coating, alternating with polished, matt, vertical satin-brushed and sandblasted finishes. The tourbillon bridge visible on the dial side is a tour de force, with its mirror-polished and chamfered surfaces, polished flanks, and sandblasted underside. The decoration alone of each movement thus requires dozens of different craftsmanship skills. Nearly a year of trials was needed to achieve this level of finishing, enabling the complexity of this new movement on the dial side to be fully admired for the first time.


Ferdinand Berthoud Régulateur Squelette 4


The FB-T.FC-RS calibre features a pillar-type structure in which the barrel and the reverse fusee are both suspended and patented. This fusee-and-chain transmission mechanism is inspired by that of Ferdinand Berthoud’s marine chronometers. It ensures the distribution of energy by delivering “constant force” to the tourbillon with its direct-drive seconds. This novel construction is the third patent to be filed.


Ferdinand Berthoud Régulateur Squelette 5

Finally, the fourth patent applies to the power-reserve indicator. Visible on the case-back side, a suspended truncated cone moves up and down along an arbor connected to the barrel. A feeler spindle in the form of a mobile arm tipped with a watch jewel reflects the state of wind of the barrel thanks to its position on the cone. It transmits the information to the dial side by means of flat levers and a spiral spring, where the “0_1” power-reserve indicator is engraved on the regulator plate at the
10 o’clock position.

Like all Chronométrie Ferdinand Berthoud movements, the FB-T.FC-RS calibre is officially chronometer-certified and was submitted to the Fleuritest during its development phase. Each of the FB 1RS 6.4 & 6.5 are one-of-a-kind unique pieces that are part of Ferdinand Berthoud’s Régulateur Squelette lineup, where only 20 versions were made. The Ferdinand Berthoud FB 1RS 6.4 & 6.5 are now available at unit #B2M-202 at The Shoppes at Marina Bay Sands, both with a retail price of
S$358,500 (including GST).