Watch & Jewelry
March 31, 2015
Richard Mille | RM025 Tourbillon Chronograph Diver's
Richard Mille
RM025 Tourbillon Chronograph Diver's
Text by OPENERS
Richard Mille has consistently pushed the boundaries of watchmaking, creating timepieces that can withstand the rigors of land and sea, and even the G-forces of Formula 1 racing. Now, with the "RM025," the brand turns its attention to the "deep sea." A striking departure for Richard Mille is the adoption of a round case, designed to meet the ISO standard for diver's watches: 30 atmospheres of water resistance (300 meters).
The unique three-part case construction utilizes torque screws. By applying optimal tension to each screw individually as needed, the outer circumference of the case is perfectly sealed with uniform pressure, ensuring high water resistance over extended periods. The water resistance is further enhanced by the torque-screw-secured lugs, a screw-down crown, and newly developed, fully waterproof push-buttons.
The bezel also features a novel three-layer structure, joined by 24 screws. In accordance with ISO 6425 standards, the bezel rotates in only one direction to prevent miscalculation of dive times. Furthermore, the entire bezel system is screwed into the case, ensuring perfect stability and minimizing the risk of displacement or loosening.
This meticulous attention to detail in the exterior construction undoubtedly enhances water resistance. However, Richard Mille's true prowess is equally evident in its internal mechanisms. The "RM025," developed for underwater exploration, houses a skeletonized engine that embodies Richard Mille's spirit of challenge, refusing to be confined by conventional concepts.
The caliber RM025 is equipped with a highly complex tourbillon chronograph. The mainplate is crafted from carbon nanofiber, a material developed specifically for Richard Mille's tourbillon watches. This high-tech material, known for its lightness and exceptional rigidity, is ideally suited for a diver's watch designed to withstand extreme environments. To the left of the barrel at 12 o'clock is a power reserve indicator displaying the remaining winding tension, and to the right is a torque indicator, which maintains optimal precision by displaying the mainspring's tension.
Visible through the sapphire crystal case back on the reverse side, at the 12 o'clock position, is the large and distinctive column wheel. This control system, including its levers, which governs the chronograph's functions, utilizes titanium to reduce energy consumption by approximately 50%. This significantly minimizes friction on the axis, resolving issues of needle jump and shock during start/stop operations.
This highly precise watch, equipped with such intricate mechanisms, is a testament to Richard Mille's technical expertise and unwavering dedication. While the decision to actually dive with it rests with the owner, we must express our admiration for the brand's ability to achieve such a high level of performance. It is also worth noting that assembly and inspection are exceptionally complex, with only a handful of watchmakers dedicating several months to each piece, resulting in a very limited annual production.
Richard Mill RM025 Tourbillon Chronograph Diver's Watch
Manual winding
21,600 vibrations per hour
Approx. 70-hour power reserve
Case diameter x thickness | 50.7 x 19.2mm
Titanium case x 18KPG lugs
Rubber strap
Water resistance | 30 ATM (300m)
Price | 52,500,000 JPY