RM028 Les Voiles de Saint Barth
TECHNICAL SPECIFICATIONS OF THE RICHARD MILLE DIVER'S WATCH
RM 028 VOILES DE SAINT BARTH
CALIBER RMAS7: skeletonized automatic winding movement with hours, minutes, central seconds, date and adjustable rotor geometry.
Dimensions: 47.00 mm x 14.60 mm.
MAIN FEATURES
(MANY OF WHICH ARE MAJOR TECHNICAL INNOVATIONS)
ROTOR WITH VARIABLE GEOMETRY
- Arm in grade 2 titanium
- Flange in grade 2 titanium
- 6-positional adjustment via grade 5 titanium screws
- Ribs in 18-carat, high palladium content white gold
- Weight segment in tungsten/cobalt alloy
- Ceramic ball bearings
- Unidirectional anti-clockwise winding direction
This exclusive RICHARD MILLE design allows the rewinding of the mainspring to be adapted most effectively to the user's activity.By adjusting the setting of the rib's placement, the rotor's inertia is modified to either speed up the winding process in the case of leisurely arm movements, or slow it down when sporting activities are pursued. As a result, this invention allows the movement's winding mechanism to be optimized.
POWER RESERVE
Circa 55 hours.
BOTTOM PLATE, BRIDGES AND BALANCE COCK MADE OF TITANIUM
The manufacture of these components in grade 2 titanium with black PVD coating allows the whole assembly to be given great rigidity, as well as precise surface flatness which is essential for the perfect functioning of the gear train.
DOUBLE BARREL SYSTEM
The double barrel system helps to improve the stability of torque over a longer period.
This is achieved by using more turns, thereby reducing pressure and friction on the teeth, the bearings and the pivots, resulting in improved long-term performance.
EIGHT-POINT-STAR-SHAPED TORQUE AND SPLINE SCREWS IN GRADE 5 TITANIUM FOR THE BRIDGES AND CASE
This permits better control of the torque applied to the screws during assembly. These screws are therefore unaffected by physical manipulation during assembly or disassembly and age well.
DATE DISPLAY
Semi-instantaneous, placed in a vertical aperture in the numeral 7. The calendar disc of sapphire crystal is treated with non-reflective coating on both sides.
CASE
The watch is water resistant to 30 atmospheres (300 meters) following ISO 6425 diver's watch norms.
This is achieved with a unique, curved, tripartite case. The lugs of all versions are in titanium, with screws to attach the rubber diving strap for maximum security.
BEZEL
Built up of three layers connected with 22 screws, turning unidirectionally following ISO 6425 norms to avoid timing miscalculations. The use of an additional screwed system attaching the bezel to the watchcase makes it absolutely stable as well as impossible to inadvertently dislocate or loosen.
In addition, the use of screws allow for perfect adjustment since the bezel is not tensioned into position.
INTERIOR FLANGE (upper and lower)
In carbon fiber, with index points filled with approved luminous material.
DIAL
In sapphire (thickness: 0.40 mm) with anti-glare treatment (2 sides), protected by 8 silicon braces inserted in the upper and lower grooves.
CRYSTAL
- Bezel side: in sapphire (1800 Vickers) with anti-glare treatment (2 sides).
- Thickness: 3.00 mm
- Case back: in sapphire with anti-glare treatment (2 sides)
- Thickness: at the center 1.90 mm and at outer edges 2.60 mm
OTHER FEATURES
- Dimensions of movement: 30.25 x 28.45 mm
- Thickness: 4.33 mm
- Number of jewels: 32
- Barrel arbor in AP 20 steel
- Balance: GLUCYDUR, 3 arms, inertia moment 4.8 mg.cm2, angle of lift 53š
- Frequency: 28,800 vph (4 Hz)
- Balance spring: ELINVAR NIVAROX
- Shock protection: INCABLOC 908.22.211.100 (transparent)
- Escapement wheel jewels: Rubifix (transparent)
- Stem with three positions: manual winding, time setting, date adjustment
FINISHING
MOVEMENT
- Bottom plate and bridges in titanium, wet sandblasted, PVD treated
- Burnished pivots
- Diamond polished sinks on the bridge side
- Pinions with undercuts
- Sandblasted and rhodium-plated, beveled wheels
STEEL PARTS
- Sapphire blasted surfaces
- Anglage and polishing by hand
- Screw slot and screws beveled and polished with rounded and polished tip
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