This extraordinary mechanical timepiece from the House of Richard Mille features a wrist hugging, ergonomically curving tripartite case made of sapphire and a manual winding tourbillon movement.
Pharrell Williams has been known for his ardent passion for the science fiction series Star Trek. This new timepiece by Richard Mille reflects the same passion. Its dial illustrates the Valles Marineris’ view on the astronaut’s helmet.
The watch is equipped with Calibre RM52-05, a hand-wound mechanical tourbillon movement with hours and minutes function. Its base-plate and bridges are made of Grade 5 titanium, a biocompatible, highly corrosion-resistant and rigid alloy. The titanium structure of the movement evokes rocket launching platforms. Inspired by the cosmic universe, the base-plate features large inserts in alluring blue aventurine glass.
The terminal-curve spring equipping the balance wheel guarantees greater reliability when subjected to shocks or strong vibrations and during movement assembly and disassembly, hence ensuring better chronometric results over time. The regulator index is eliminated, and a more accurate and repeatable adjustment is possible thanks to 4 setting screws.
The fast rotating barrel significantly eliminates the phenomenon of periodic internal mainspring adhesion. It also has the provision of an excellent mainspring delta curve. These qualities ensure excellent performance and better power reserve. The central involute profile of the winding-barrel teeth provides an optimal pressure angle of 20°. This promotes effective rotary motion and compensates for possible variations in the engagement of the going train, thus ensuring excellent torque transmission with a distinct improvement in performance.
The grade 5 titanium helmet resting on a structure depicting the upper part of a spacesuit, also in grade 5 titanium, connects the dial to the movement beneath it. It has been painted white using an airbrush that was initially developed for street artist Cyril Kongo, who hand-painted the RM 68-01.
The projectors and cameras are represented by two diamonds and a black sapphire set on either side of the helmet. To recreate the imaginary Martian scene, the curved 5N gold visor has been engraved using specially created burins, grand-feu-enamelled and then hand-painted.
The bezel ring and caseback are made of brown Cermet, a high tech material that combines the lightness of titanium with the hardness of ceramic. Both these parts are affixed to a caseband made of Carbon TPT®. The tripartite case of the RM 52-05 is milled and ground from blocks of solid sapphire.
The watch is water-resistant to 50 metres, ensured by 2 Nitrile O-ring seals, and is assembled using 24 spline screws in grade 5 titanium and abrasion-resistant washers in 316L stainless steel.
The Richard Mille RM 52-05 Manual Winding Tourbillon Pharrell Williams is limited to 8 pieces.
Model: Richard Mille RM 52-05 Manual Winding Tourbillon Pharrell Williams
Sapphire case, tripartite
Bezel side: in sapphire (hardness of 1800 Vickers) with anti-glare treatment (both sides); Thickness: 1.50 mm
Case back side: in sapphire (hardness of 1800 Vickers) with anti-glare treatment (both sides); Thickness: 1.20 mm
Manual winding tourbillon movement with hours and minutes
Dimensions: 32.80 x 30.90 mm
Thickness: 6.40 mm
Tourbillon diameter: 10.90 mm
Balance wheel diameter: 9.12 mm
Balance wheel: Glucydur®, 2 arms and 4 setting screws
Moment of inertia: 11.50 mg.cm2, angle of lift: 53°
Frequency: 21,600 vph (3 Hz)
Balance spring: elinvar by Nivarox®
Shock protection: KIF ELASTOR KE 160 B28
Barrel shaft: in nickel-free Chronifer® (DIN x 46 Cr 13 + S) with the following characteristics: stainless – antimagnetic – suitable for tempering
– Hand-polished anglage
– Microblasted milled sections
– Stretched or polished upper surfaces
– Microblasted surfaces
– Satin-finished surfaces
– Hand-polished anglage
– Long strokes
– Brushed strokes
– Long side strokes
– Polished edges
– Diamond chamfering
– Circular decorated faces
– Rhodium plating (before cutting the teeth) Minimal corrections applied to the wheels in order to preserve geometry and performance.