RM 037

Automatic Winding

Skeletonised automatic-winding in-house movement

Hours, minutes, variable-geometry rotor, oversize date and function selector

Power reserve: around 50 hours (± 10%)

Dimensions: 52.20 x 34.40 x 12.50 mm

Microblasted grade 5 titanium with an electroplasma treatment gives great rigidity to the baseplate, as well as precise surface flatness which is essential for the perfect functioning of the gear train. The bridges are also in grade 5 titanium, microblasted and electroplasma treated.

The skeletonised baseplate and the bridges were subjected to separate and extensive validation tests to ensure optimal strength requirements.

Semi-instantaneous, horizontally placed under 12 o’clock, functioning via two skeletonised calendar discs over a white field.

The function selector shows Richard Mille’s passion for mechanical innovation. A push-button makes it possible to select the winding, neutral and hand-setting functions with a simple push. A hand displays the selected function: W (Winding) – N (Neutral) – H (Hand Setting).

With this special gear system, stressful forces placed upon the crown are minimised, and any possible interference of the crown’s functions with the movement is made impossible.

Movement dimensions: 28.00 x 22.90 mm

Thickness: 5.79 mm

Number of jewels: 25

Balance: CuBe, 4 arms and 4 setting screws, moment of inertia 7.5 mg•cm2, 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)

Created from grade 5 titanium, red gold or white gold, with O-ring seal and collar in Alcryn®, this crown fully guarantees the integrity of the movement protecting the mechanism from external influences, since it does not use a classical crown attachment that penetrates to the movement’s heart.

The result is a crown that is virtually impossible to dislodge, yet is easily inserted and removed in the skillful hands of the watchmaker when needed; a longsighted view that is typical of the brand’s philosophy.

• • Microblasted anglage

• • Microblasted-milled section

• • Microblasted sinks

• • Electroplasma treatment for the baseplate and bridges

• • Satin-finished surfaces

• • Hand-polished anglage

• • Hand-polished sinks

• • Burnished sections

• • Lapped and polished ends

• • Burnished pivots

• • Post faces polished

• • Concave chamfering with a diamond tool

• • Diamond-polished angles

• • Circular-finished faces

• • Rhodium plating (before cutting the teeth)

This type of barrel provides the following advantages:

The phenomenon of periodic internal mainspring adhesion is significantly diminished, thereby increasing performance. Provision of an excellent mainspring delta curve with an ideal power reserve/performance and regularity ratio.

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.

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.