2012 First Round Finalist Of The ‘best Jewelry Watch’ At The Geneva Fine Watch Salon Richard Miller Rm052 Skull Tourbillon Watch

Throughout history, the skull has been recorded on many occasions and concepts. The skull marks are sometimes purely visual effects, and sometimes they are related to religious and conscious concepts. Latin Americans see it as a symbol of life; Europeans associate it with death, and the image of the skull reminds Europeans of ephemeral life and golden time. The RM 052 skull tourbillon watch is a visual interpretation of this. The bottom plate and splint of the movement are made of titanium alloy skull shape. Richard Mille blends the skull perfectly into the movement. The skull’s upper and lower jaws hold the ruby ​​of the tourbillon frame, while the back of the skull is designed as the central splint of the movement. Both the hollow base plate and the plywood are rigorously tested to ensure the best strength requirements.
    The movement is connected to the case with 4 tabs, inspired by the crossed bones on the pirate flag. The new case design uses perspective edges to continue the hollowed-out myth. While others are just content to dig into the visual aspects of the skull, Richard Mille has embedded the concept of the skull into the entire timepiece. This timepiece is a pinnacle of freedom and indomitable spirit, and echoes the brand concept: to create extraordinary timepieces, representing the pinnacle of the industry. Limited edition of 21 pieces, including 15 titanium models and 6 ‘only one’ models of red gold gemstone skulls.

RICHARD MILLE RM 052 Skull Tourbillon Technical Features
Limited edition of 21 pieces (15 titanium models and 6 red gold ‘only one’ models)
RM 052 movement: manual winding tourbillon movement with hour and minute display.
Dimensions: 42.70 mm x 50.00 mm x 15.95 mm
Main technical characteristics
Movement base plate and splint made of grade 5 titanium alloy
    Derived from skull inspiration, the RM 052 is breathtaking in both technical and aesthetic terms. Made of Grade 5 titanium alloy, this biocompatible, super corrosion-resistant, and extremely strong alloy makes the gear train more perfect. This alloy contains 90% titanium, 6% aluminum and 4% vanadium. This combination can further enhance its mechanical properties and is often used in the aviation, aerospace and automotive industries. The skull’s upper jaw holds the ruby ​​of the tourbillon frame, and the back of the skull is made into the central splint of the movement. The movement is connected to the case with 4 splints, making the ‘Skull Flag’ alive.
Hollow base plates and plywood are fully validated and tested to ensure optimal strength requirements.
Power reserve
48 hours.
Variable inertia, automatic bouncing balance wheel
    The automatic bouncing balance wheel can effectively improve the reliability of the watch under vibration, assembly and disassembly of the movement, and ensure more accurate movement for a long time. Eliminate the scale plate and use the 4 adjustment screws for more accurate and repeatable adjustments.
Quickly rotate the barrel (6 hours instead of 7 and a half hours)
This type of barrel has the following advantages:
-Significantly reduce the periodic adhesion of the mainspring, thereby improving its performance;
-Ideal power reserve / performance and regularity ratio, forming a perfect mainspring delta curve.
Barrel pawl with progressive rebound function
    This device can save considerable energy (approximately 20%) during winding, especially at the beginning of winding. It also promotes an even distribution of the internal tension of the mainspring.
Spring barrel tooth and third pinion with central helical tooth
    Clockwork barrel teeth and pinions with a central helical tooth shape can provide an optimal 20-degree angular pressure, which helps the gear to rotate more efficiently, and can offset the meshing deviation of the running gear, thereby ensuring good torque Transmission and significantly improved its performance.
Splint grade 5 titanium spline screws
    The use of this type of screw can better control the torque of the screw during assembly, so the screw is durable because it will not be damaged during assembly and disassembly.
Other technical characteristics
-Movement size: 32.80 x 30.90 mm
-Thickness: 6.87 mm
-Tourbillon diameter: 10.90 mm
-Diameter of balance wheel: 9.12 mm
-Total jewel bearings: 19
-Balance wheel: Glucydur, 2 swings, 4 fixing screws
-Instantaneous inertia: 11.50 mg.cm2, inclination 53 °
-Swing frequency: 21,600 vph (3 Hz)
-Balance spring: Elinvar spring by NIVAROX
-Seismic protection: KIF ELASTOR KE 160 B28
-The barrel bearing is made of nickel-free chronifer alloy (DIN x 46 Cr 13 + S), which has the following characteristics: no rust, anti-magnetization, and can withstand tempering
    The case of the RM 052 watch needs to go through 86 stamping processes. Only the three major parts of the case (bezel, ring and case back cover) need to go through 49 processes. The cutting and milling processes can only be performed after all of them are completed. Reducing the weight of the case by making holes in the bezel and case back, this is the first case of Richard Mille. The original skeleton case with skull skeleton movement is the icing on the cake.
    Making a Richard Mille case takes 20 hours to debug the machine and 30 hours to program. The case requires 255 machining processes, and the finishing process includes a 5-hour mercerizing sanding and polishing process. Only with a sophisticated case such as a professional and complicated five-axis machine tool can it be successfully made. The ‘Richard Mille’ relief lettering on each case also takes 45 minutes. The bevelled edges of the case columns, the bezel and the holes in the case back are polished by hand.
    The three-piece case is water-resistant to 50 meters with two Ding Qing O-rings. The case is assembled with 20 Grade 5 titanium alloy spline screws and wear-resistant 316L stainless steel washers.
Case with grade 5 titanium alloy spline screws
    The use of this type of screw can better control the torque of the screw during assembly, so the screw is durable because it will not be damaged during assembly and disassembly.

Torque-limited crown
    This crown helps to strengthen the safety factor and prevent accidental overwinding, thus avoiding all kinds of potential damage, such as the winding of the winding stem or the excessive pressure of the barrel.
The outer flange is made of carbon fiber, and the inner flange is made of grade 5 titanium alloy.
crystal glass
Bezel: Anti-glare sapphire (1800 Vickers hardness) on both sides
Thickness: 1.50 mm
Case back: Anti-glare sapphire on both sides
Thickness: 1.20 mm at the center and 2.04 mm at the edges
Seiko modification
-Beveled by hand
-Parts are micro-blasted and sanded
-The outer surface is painted or polished
Stainless steel parts
-Fine sand blasting on the surface
-Mercerized surface
-Beveled by hand
-Hand-painted upper surface
-Matte underside
-Vertical hand-drawn lines on the sides
-Polished grooves
-Polished and polished ends
-Polished pivot
-Concave bevel cut with diamond cutter
-Round surface treatment
-Rhodium plating (before cutting gear teeth)
-Fine-tune the gear to ensure its geometry and overall performance