The Richard Mille RM 07-02 Automatic Sapphire Skeleton Diamond Dial in Lilac Sapphire is a 46.75mm by 32.90mm luxury timepiece defined by its vibrant lilac-colored synthetic sapphire case. This complex tonneau-shaped case requires over 1,000 hours of machining, including 430 hours for pre-forming and 350 hours for polishing, to achieve its ergonomic curves and transparency. The watch features an intricate skeletonized dial adorned with diamonds and geometric shapes, revealing the in-house CRMA5 automatic movement. Crafted with a baseplate and bridges of 18k white or red gold, the movement is wound by a variable-geometry rotor that adjusts to the wearer’s activity level and provides a power reserve of approximately 50 hours.
In terms of complications and technical features, the RM 07-02 focuses on essential timekeeping while showcasing high-end mechanical ingenuity. The CRMA5 caliber operates at 4 Hz and includes a fast-rotating spring barrel that enhances performance by reducing internal friction. The watch is engineered for 30 meters of water resistance, secured by grade 5 titanium spline screws and dual gaskets. The unique lilac hue of the sapphire is achieved through the precise incorporation of metal oxides into the crystal lattice, a process that requires extensive trial and error to ensure color consistency and structural integrity.
General reviews of the RM 07-02 collection often emphasize its role as a pinnacle of technical feminine watchmaking, successfully merging the “Pink Lady” aesthetic with serious horological complexity. Enthusiasts frequently praise the transparency of the sapphire case, which allows for an unobstructed view of the gold movement and gem-set rotor from every angle. While the bold, confectionery-like colors and substantial price point are sometimes described as excessive, the watch is widely respected for the immense technical difficulty involved in diamond-setting within a sapphire substrate. Limited to only seven pieces in this specific lilac iteration, it is regarded by collectors as an exceptionally rare fusion of artistic elegance and advanced engineering.