Tourbillon RM 018 " Hommage à Bouchron". Patnership betwer Richard Mille and Boucheron. Special limited edition to 30 models for the 150th anniversary of the house of Boucheron.
Caliber RM 018 : Manual winding tourbillon with power reserve, hours, minutes, seconds
Dimensions : Length 48 mm x 39.30 mm (widest point) x 13.84 mm (thickest area)Movement dimensions: 30.20 x 28.60 mm.

Thickness: 8.70 mm. Diameter of the tourbillon cage: 10.90 mm. Diameter of the balance wheel: 10 mm. Number of jewels: 24. Balance wheel: GLUCYDUR, 2 arms. Moment of inertia: 10 mg cm2, lever angle 53°. Frequency: 21,600 vph (3 Hz).

Power reserve: 48 hours. Balance spring: ELINVAR by NIVAROX. Shock protection: KIF ELASTOR KE 160 B28. Stone settings in white gold. Barrel shaft: in chronifer without nickel (DIN x 46 Cr 13 + S), which has the following characteristics:
non-oxidizable "antimagnetic" hardened.

Movement: Anglage and polishing by hand, Locking sections hand polished, Sapphire blasted milled sections, Lapped and polished contact points, Burnished pivots
Steel parts: Sapphire blasted surfaces, Satin-finished surfaces,
Anglage and polishing by hand
Wheels and teeth: (Applies to all metal as well as semi-precious, precious/metal wheel combinations), Concave chamfering with a diamond tool, Circular finished faces, Gilding (before cutting the teeth), Minimum manual correction to the wheels undertaken in order to preserve geometry and performance.

Bezel side: In sapphire (1800 Vickers) with anti-glare treatment (2 sides). Thickness: 1.20 mm
Case back: In sapphire with anti-glare treatment (2 sides) Thickness: at the center 1 mm and outer edges 1.73 mm
Dial in sapphire (thickness: 0.40 mm) with anti-glare treatment, protected by 8 silicone braces inserted in the upper and lower grooves.
Flange (upper and lower) in carbon fiber with index points filled with approved luminous material..