Chronomètre FB 1RS.6


One movement, two cases

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This regulator-type chronometer movement with tourbillon and fusee-and-chain transmission is the result of comprehensive technical and aesthetic development and is inspired by Marine Clock No. 8, produced by the master-watchmaker in Paris in 1768. The dial in black PVD nickel silver is decorated with vertical satin-brushed and sandblasted finishes and offers three openings: the hours at 2 o'clock, the minutes at 12 o’clock and the power reserve at 10 o'clock. The production of this movement will be strictly limited to 20 in all where the choice of watch exterior will be left to the collector. The FB 1RS.6 with an octagonal case in carburised stainless steel is one of the variations offered by the Manufacture.



The case of the Chronomètre FB 1RS.6 is made of a new material: carburised stainless steel, a steel whose molecular structure has been reinforced by a thermochemical process. Its exceptional hardness of 1,200 vickers on the surface makes it extremely resistant, particularly to corrosion.


The FB-T.FC-RS Calibre is the first skeleton movement produced by the Manufacture. 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.


The main plate has 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.


    • Material : Case and lugs in ultra-resistant carburised stainless steel
    • Case Type : Octagonal case fitted with two transparent sapphire portholes
    • Diameter : 44 MM
    • Thickness : 13.95 MM
    • Water resistance : 30M
    • Glass : Domed, arched sapphire crystal, glareproofed on both sides
    • Case-back : Screw-in with glareproofed sapphire crystal
    • Crown type : Dynamometric crown in carburised stainless steel with black ceramic medallion
    • Calibre : FB-T.FC.RS
    • Type Of Movement : Mechanical hand-wound movement
    • Type Of Winding : Tourbillon with constant force with fusée-chain transmission
    • Diameter : 37.30 MM
    • Тhickness : 9.89 MM
    • Lines : 15 ¾
    • Number of jewels : 49
    • Frequency : 21'600 A/h (3 Hz)
    • Power reserve : 53 hours
    • Number of components : 1158
    • Chain length : 285 MM
    • Certification : Chronometer-certified by the COSC
    • Limited production (encompassing all types of case) : 20 movements
Dial and Hands
    • Dial : Openworked regulator plate (dial) in vertical satin-brushed black PVD-treated nickel silver
    • Steel fixed hours 
    • Steel power-reserve hand
    • Rhodium-plated bronze seconds hand
    • Power-reserve at 10 o'clock
Functions and Display
    • Hours display on a sapphire disc at 2 o'clock
    • Minutes display at 12 o'clock
    • Central seconds
Strap and Buckle
    • Strap : Hand-sewn rolled-edge alligator leather strap
    • Buckle : Titanium double-blade length-adjustable folding clasp with carburised stainless steel cap