Limited edition of 50 timepieces.

Caliber RM27-01: manual winding tourbillon movement with hours and minutes. Dimensions: 45.98 mm x 38.90 mm x 10.05 mm.

Weight of the movement: circa 3.5 g


Power réserve: 45 hours (±10%).

Baseplate of the movement in Grade 5 titanium and bridges in aluminum-lithium
The movement of the RM 27-01 is made of titanium and LITAL®, a lithium alloy containing aluminium, copper, magnesium and zirconium, with a density of 2.55.
The addition of Lithium provides to the mechanism more flexibility and greater shock resistance. This alloy is also applied in aerospace on the Airbus A380, helicopters, rockets, satellites as well as in Formula 1.
The skeletonised baseplate and the bridges have been subjected to intensive and complete validation tests to optimise their resistance capacities.

Case-suspension mechanism
The baseplate of the RM 27-01 Rafael Nadal is attached to the case by 4 braided steel cables, each with a diameter of just 0.35 mm.
These cables are held taut by an ingenious mechanism of tensioners (located at 3 and 9 o’clock) and pulleys, which act like pylons positioned at the four corners of the movement. Each cable is fixed to the tensioner, and passes over the upper pulley and into the movement, before returning via the lower pulley to finish in the lower flange. Once the watchmaker has threaded the cables, he tensions them by rotating the central tensioner ring using a special tool.
Designed to stay in suspension inside its case, the caliber RM27-01 can withstand accelerations of over 5,000 G.

Free sprung balance with variable inertia
A free sprung balance with variable inertia and a terminal-curve spring (originally designed for pocket watches) guarantees greater reliability in case of impacts and during movement assembly and disassembly, thus achieving better chronometric results over time.

Fast rotating barrel (6 hours per revolution instead of 7.5 hours)
This type of barrel has the following advantages:

• The phenomenon of periodic internal mainspring adhesion is significantly diminished and performance is thus enhanced,
  
• It provides an excellent delta of the mainspring curve.

The choice is determined by the ideal power-reserve/performance/regularity ratio.

Barrel pawl with progressive recoil
This device permits an appreciable winding gain (circa 20 %), especially during the start of winding. It also promotes the even distribution of the mainspring’s internal tension.

Winding barrel teeth and centre-wheel pinion with central involute profile
The central involute profile of the winding barrel teeth provides an optimal pressure angle of 20°, which promotes effective rotary motion and compensates for possible variations in the operation of the going train. This, in turn, ensures excellent torque transmission and a distinct improvement in performance.

Spline screws in Grade 5 titanium for the bridges
This permits better control of the torque applied to the screws during assembly. These screws are therefore unaffected by physical manipulation during assembly or disassembly and age well.

• Movement dimensions: 27.20 mm x 21.72 mm
  
• Thickness: 5.04 mm
  
• Tourbillon diameter: 12.30 mm
  
• Balance diameter: 10.00 mm
  
• Number of jewels: 19
  
• Balance: in Glucydur, with 2 arms and 4 setting screws
  
• Moment of inertia: 11.50 mg.cm², angle of lift 53°
  
• Frequency: 3 Hz (21,600 vph)
  
• Balance spring: in ELINVAR by Nivarox®
  
• Shock absorbers: Kif Elastor by KE 160 B28
  
• Barrel shafts: in nickel-free Chronifer (DIN x 46 Cr13 + S),
  with the following characteristics: stainless, non-magnetic, tempered.

Case
The case of the RM 27-01 is made from an extremely strong anthracite polymer injected with carbon nanotubes. This combination produces a material that protects the movement and the tourbillon positioned inside it against impacts. The caseband and case back feature monobloc constructions for evermore improved lightness and rigidity.
The crystal, with its anti-reflective treatment, has remarkable properties that ensure extreme toughness and optimum rigidity.

Spline screws in Grade 5 titanium for the case
Due to their design, these screws offer better control of the torque applied to them during assembly.
They therefore remain unaffected by the physical manipulations involved in assembly and dismantling, and age well.

Flanges
Upper flange in aluminium with hour-markers filled with an approved luminescent substance.

Crystal
In Grilamid TR-90.
Thickness: 1.20 mm and 4.01 mm at the edges


Movement

• Hand-polished bevelling
  
• Shot-blasted milled sections
  
• Stretched upper surfaces

Steel parts

• Shot-blasted surfaces
  
• Satin-brushed surfaces
  
• Hand-polished bevelling
  
• Long strokes
  
• Matt “brouillé” strokes
  
• Long strokes on the sides
  
• Polished sinks

Profile-turning

• Lapped and polished ends
  
• Burnished pivots

Wheels

• Diamond-polished sinks
  
• Circular decorations on the front surfaces
  
• Rhodium-plating (before cutting the teeth)
  
• Minimal corrections are made to the wheels to preserve their geometry
  and overall performance