Richard Mille RM 07-02 Automatic Winding Sapphire

Richard Mille presents RM 07-02 Automatic Winding Sapphire, an ultra-feminine watch crafted from colored sapphire. After the immense success of their gem-set ceramic and Carbon TPT® watches, Richard Mille now comes with a colored sapphire case adorned with diamonds.

Sculpted from colored sapphire taken from a single block, the watch case features an elegant tonneau shape. Due to its extreme hardness, Sapphire is a material difficult to machine. Further, finishing and setting diamonds into a sapphire case are also challenging. Richard Mille has succeeded in both the above process thanks to the high-end watch manufacture’s expertise in dealing with innovative materials, technical know-how and uncompromising quality controls.

Richard Mille RM 07-02 Automatic Winding Sapphire

The watch houses the automatic movement Calibre CRMA5 in 18k 5N red gold or white gold and set with hundreds of diamonds. The skeletonised movement comes in micro blasted white gold for the green and blue sapphire versions, and in 5N red gold for the pink and brown sapphire versions.

The baseplate and the bridges of this haute-horlogerie movement are machined from 18K red gold or white gold, which is microblasted and bevelled by hand. The baseplate is decorated and set with hundreds of diamonds, an aesthetic feat achieved thanks to the long and delicate work of the gem setter. The skeletonised baseplate and bridges were subjected to separate and extensive validation tests to optimise their resistance capacities.

Richard Mille RM 07-02 Automatic Winding Sapphire

Beating at the rate of 28,800 vph (4 Hz), the movement provides a power reserve of up to 50 hours. The rotor allows to be set according to the owner’s activity level. The setting is modified by adjusting two weights that can be adjusted and fixed in place by spline screws. The inertia of the movement is increased when the two weights are closer to each other; the barrel then rewinds more quickly. If the weights are positioned at the extremities of the rotor, the inertia is decreased and the barrel winds more slowly.

This high-tech mechanical movement is fitted with a fast-rotating barrel. It diminishes the phenomenon of periodic internal mainspring adhesion, thereby increasing performance. This fast-rotating barrel also has an excellent mainspring delta curve with an ideal power reserve/performance and regularity ratio.

The entire going train of the watch, the primary transmitter of power to the movement, utilises a special profile for the wheel teeth with a 20˚ pressure angle. This system equalises any discrepancies that might arise between the centres of each wheel, for instance during thermal changes and normal use, and promotes an excellent transmission of torque to the balance wheel, thus supporting superior chronometric results.

This type of balance wheel represents the ultimate in innovation. It guarantees greater reliability when subjected to shocks or during movement assembly or disassembly, hence better chronometric results over time. The regulator index is eliminated, and a more accurate and repeatable calibration is possible thanks to 4 small, adjustable weights located directly on the balance.

Richard Mille RM 07-02 Automatic Winding Sapphire

The tonneau shaped case measures 32.90 x 46.75 x 14.35 mm. In some versions, the bezel is set with diamonds. Setting each element of the sapphire case is a real engineering feat requiring a laser operating to the nearest micrometre. In the diamond-set cases, Prongs in red or grey hand-polished gold, made separately, are then inserted, creating multiple settings to hold a delicate row of diamonds.

Richard Mille RM 07-02 Automatic Winding Sapphire

Maintaining transparency, the colored sapphire case allows you to admire all the details of the movement structure, finishing and the beautiful diamond setting of the interior. Depends upon the version, the watch dial is available in mother-of-pearl, jasper or pave-set stones.

Technical details

Movement
CALIBRE CRMA5
Skeletonised automatic-winding in-house movement
Hours, minutes and variable-geometry rotor
Baseplate, bridges and variable geometry rotor in gem-set 5N red gold
Power reserve: Circa 50 hours (± 10%).
Movement dimensions: 29.90 x 22.00 mm
Thickness: 5.05 mm
Number of jewels: 25
Balance: CuBe, 4 arms, 4 setting screws, moment of inertia 7.5 mg•cm 2, angle of lift 50°
Frequency: 28,800 vph (4 Hz)
Balance spring: AK3
Shock protection: INCABLOC 908.22.211.100 (transparent)
Escapement wheel jewels: Rubifix (transparent)
• Heavy external outside edge and heavy edge ring in 5N red gold
• Weight segment in heavy metal
• Ceramic ball bearings
• Automatic OneWay® ceramic winding system with ball bearings
• Bidirectional winding system

Case
Colored sapphire (green, blue, pink or brown)
Dimensions: 32.90 x 46.75 x 14.35 mm

Finishing

Movement

• Hand-polished anglage
• Microblasted milled sections
• Hand-polished sinks
• Burnished sections

Steel parts

• Satin-finished surfaces
• Hand-polished anglage
• Hand-polished sinks
• Burnished sections

Wheels

• Concave chamfering with a diamond tool
• Diamond-polished angles
• Circular-finished faces
• Rhodium plating (before cutting the teeth)