Belief in broadening the discipline of watchmaking
RM 003-V2 TOURBILLON
Manual winding tourbillon movement with hours, minutes, second time zone, function selector, power-reserve and torque indicators.
Circa 70 hours (± 10%).
This is an isotropic composite material created from carbon nanofibres, moulded under pressure of 7,500 N/cm2 at a temperature of 2,000˚C, resulting in a material with great mechanical, physical and chemical stability in all directions.
The ribbed perimeter of the movement baseplate ensures the highest rigidity of the baseplate and bridges.
Carbon nanofibre composite structures such as this are amorphous, chemically neutral and dimensionally constant within a very wide range of operating temperatures, including those outside of normal experience.
This stability ensures the greatest integrity of the movement’s going train under all conditions.
Grade 5 titanium is a biocompatible, highly corrosion-resistant and remarkably rigid alloy composed of 90% titanium, 6% aluminium and 4% vanadium. This combination further increases the material’s mechanical properties, which explains its frequent use in the aerospace, aeronautics and automobile industries.
The baseplate and bridges have been subjected to intensive and complete validation tests to optimize their resistance capacities.
It ensures high rigidity of the baseplate and the bridge assembly of the going train.
This dual time zone indicator is technically extremely complex but also very user-friendly. At the centre of the dial, a transparent sapphire crystal disc inscribed with hours permanently rotates through the movement. The digits on the disc are apparent only when transposed on a white background situated at 3 o’clock.
This dual time zone is easily and quickly adjusted using the handsomely finished pusher situated at 9 o’clock. Each press adds an extra hour to the time zone.
In a manner similar to a car’s gearbox, a pusher located at the centre of the crown makes it possible to select the winding, neutral and hand-setting functions with a simple push. A hand at 4 o’clock displays the selected function.
This indicator supplies information about the mainspring’s tension, thus permitting an optimisation of the chronometric
functioning of the movement. Below 5.3 N.mm, the spring is considered too slack, while above 6.5 N.mm, excessive spring actually endanger it.
The power-reserve indicator shows the number of hours of energy left in the mainspring before the watch must be wound again.
This type of balance wheel guarantees greater reliability when subjected to shocks and during assembly or dismantling of the movement, thus providing better chronometric results over time. The index is eliminated, thereby allowing a more precise and repeatable calibration using 4 setting screws.
The central involute profile of the winding-barrel teeth provides an optimal pressure angle of 20°, which promotes effective rotary motion and compensates for possible variations in the operation of the going train. This, in turn, ensures excellent torque transmission and a distinct improvement in performance.
This permits better control of the torque applied to screws during assembly. These screws are therefore unaffected by physical manipulation during assembly or disassembly and age well.
Movement dimensions: 30.20 x 28.60 mm
Thickness: 6,35 mm
Tourbillon diameter: 12.30 mm
Balance wheel diameter: 10.00 mm
Number of jewels: 23
Balance: Glucydur®, 2 arms, 4 setting screws, moment of inertia 10 mg•cm2, angle of lift 53°
Frequency: 21,600 vph (3 Hz)
Balance spring: elinvar by Nivarox®
Shock protection: KIF Elastor KE 160 B28
The design and execution of the entire watch bears witness to a holistic approach to conception of the movement, case and dial. As a result, everything has been constructed according to extremely rigorous specifications, similar to the analytical engineering methods used in the design of Formula 1 racing cars, where the chassis and engine are developed in complete harmony. For example, a casing ring is no longer used, and the movement is mounted on chassis mounting rubbers (ISO SW) fixed by grade 5 titanium screws. Features such as these are evidence of uncompromising workmanship.
The tripartite case is water resistant to 50 metres, ensured by 2 Nitrile O-ring seals. The case is assembled with 12 spline screws in grade 5 titanium and abrasion-resistant washers in 316L stainless steel.
• Anglage and polishing by hand
• Locking sections hand polished
• Sapphire-blasted milled sections
• Lapped and polished contact points
• Burnished pivots
• Sapphire-blasted surfaces
• Anglage polished by hand
• Concave chamfering with a diamond tool
• Circular-finished faces
• Rhodium-plating (before cutting the teeth)
• Minimal corrections applied to the wheels in order to preserve geometry and performance.
MODULAR TIME-SETTING MECHANISM FITTED AGAINST THE CASEBACK
It provides the following advantages for longevity and maintenance:
WHEEL-BASED TIME-SETTING SYSTEM (back of the movement)
This construction provides smooth time-setting functions by eliminating engaging friction, replacing it with rolling friction.
CERAMIC ENDSTONE FOR THE TOURBILLON CAGE
This reflects a technical and long-term view towards the elimination of wear phenomena, resulting in improved technical tribology.