MASTER OF OCEAN RACE TIMING
RM 015 TOURBILLON MARINE
BRIDGES MADE OF GRADE 5 TITANIUM
These components, crafted in grade 5 titanium, confer great rigidity on the whole assembly, as well as the precise surface flatness essential for perfect functioning of the gear train.
CENTRAL BRIDGE IN STAINLESS STEEL
This provides optimised stiffness and corrosion resistance.
DUAL TIME ZONE INDICATOR
This dual time-zone indicator is technically extremely complex, while at the same time very user-friendly. At the centre of the dial, a transparent sapphire crystal disc inscribed with hours permanently rotates through the movement. The digits on the disc are visible only when transposed on a clear background, situated at 10 o’clock.
This dual time zone is quickly and easily adjusted using the finely finished pusher situated at 9 o’clock. Each push adds an extra hour to the time zone.
This indicator supplies information about the mainspring’s tension, thus permitting an optimisation of the movement’s chronometric functioning. Below 5.3 N.mm, the spring is considered too slack, while above 6.5 N.mm, excess tension in the spring can adversely affect the mechanism’s operation, or actually endanger.
The power-reserve indicator shows the number of hours of energy left in the mainspring before the watch must be wound again.
Movement dimensions: 30.20 x 28.60 mm
Thickness: 6.35 mm
Tourbillon diameter: 12.30 mm
Balance wheel diameter: 10.00 mm
Number of jewels: 23
Balance: Glucydur®, 2 arms, 4 setting screws, moment of inertia 10 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: nickel-free Chronifer® (DIN x 46 Cr 13 + S) with the following characteristics: stainless – antimagnetic – suitable for tempering
The design and execution of the watch demonstrate a holistic approach to conception of the movement, case and dial. As a result, everything has been constructed according to extremely rigorous specifications, in the manner of the analytical engineering methods used in the design of Formula 1 racing cars, where the chassis and the engine are developed in complete harmony. Features such as these are evidence of uncompromising workmanship.
Producing this case requires more than 47 preliminary procedures, followed by 255 milling operations before completion. Machining lasts 4 hours. Finishing work demands a full day for each watch.
The tripartite case is water resistant to 50 metres, ensured by 2 Nitrile O-ring seals. The case is assembled with 12 spline screws in grade 5 titanium and abrasion-resistant washers in 316L stainless steel.