Richard Mille has once again redefined the boundaries of watchmaking. In the RM 75-01 Flying Tourbillon, the brand has engineered an extraordinary technical masterstroke—a mechanical movement specifically designed to be cocooned in sapphire. The result is a collection of timepieces where architectural sublimity, sapphiric radiance and mechanical brilliance converge.
A Horological Enigma Revealed
Richard Mille was one of the first watchmakers to fully unlock the potential of sapphire, pioneering its innovative use across all three case components: the bezel, case band and case back.
For Richard Mille, sapphire is functional, aesthetic and sensory. Sapphire’s smooth surface captivates the eye. When adorned, it radiates an energy that nurtures inner harmony and wellness. The transparency and sheer brilliance of this material also accentuate the intricacies and magnificence of the movement. Being able to observe the caliber from every angle was, after all, one of Richard Mille’s primary wishes when the brand was created in 2001.
The ability to gaze into and marvel at the inner workings of a high complication is a quality that is especially rewarding in the RM 75-01 Flying Tourbillon. The groundbreaking use of sapphire transforms the fully skeletonized movement into an ethereal sculpture—an awe-inspiring visual symphony. At the heart of this experience is the RM 75-01 caliber.
Four years in the making, the movement is strikingly minimalist yet astonishingly complex. The RM 75-01 is an unapologetic study in contrasts. Sculpted with meticulous precision and arching energy, the movement’s parts come together and rise like a gothic cathedral.
A titanium baseplate coated in 5N gold PVD provides a striking contrast against the rhodium-treated wheels, while serving as the foundation for the involute-profile gear train, tourbillon and barrel. This visionary architecture eliminates the need for an upper bridge and gives form to a gravity-defying, multilevel composition that appears to float within the case.
The ensemble’s aesthetic harmony and balance stand as a testament to the meticulous thought and unwavering attention to detail poured into its creation.
“We weren’t spontaneously attracted to a two-colour treatment for the metallic components,” says Cécile Guenat, Director of Development and Creation, Richard Mille. “But when a movement is entirely crafted in 5N gold, you can’t properly distinguish its constituents. The creative team always begins by modeling the architecture before bringing out its depths using various materials and treatments.”
The ultra-skeletonized platform of the RM 75-01 Flying Tourbillon Sapphire is further accentuated by the absence of a dial, allowing the engineered elegance and mechanical artistry of the movement to take center stage.
An Odyssey of Light and Time
The limited-edition series is deeply immersed in the essence of the sea. Water, a symbol of clarity and movement, provided the guiding principle for exploring and developing the multiple facets of clear and colored sapphire lavished in the RM 75-01 Flying Tourbillon.
The RM 75-01 variant in clear sapphire has a case that recalls the surface of waves, and a green rubber strap that echoes images of tropical seas. A colored variant of the RM 75-01 Flying Tourbillon features a lilac pink shade reminiscent of a South Sea twilight, while the sapphire blue version is imbued with a tint that evokes the profound depths of the ocean.
Whether clear or hued, creating a single sapphire case requires an astonishing 1,000 hours of machining. With a hardness value of 9 on the Mohs scale, placing it just below diamond, sapphire is extremely scratch-resistant but notoriously unforgiving to work on.
Precise machining of sapphire remains one of the most complex and cost-prohibitive processes in cutting-edge watchmaking. This is where a large, single block of sapphire weighing tens of kilograms is reduced to a single tripartite case that sits comfortably and beautifully on the wrist.
Of the more than 40 days of round-the-clock machining required for each case, over a third is devoted solely to polishing—a task made especially time-consuming by the signature curvature and intricate form of a Richard Mille case.
Sublime Harmony Served Sparingly
The RM 75-01 Flying Tourbillon is as rare as it is distinctive. This manual-winding tourbillon boasts a 65-hour power reserve and is available in three variants: two that blend clear and colored sapphire, and one crafted entirely from clear sapphire. Production is strictly limited, with only 10 pieces of each colored variant and 15 of the clear variant.
“Being able to use sapphire in multiple colors offered the opportunity to create multiple identities,” says Guenat.
Colored sapphire is created by introducing metallic oxides into the crystal structure during the growth process—a method that demands precise control of temperature and timing, with intense heat playing a pivotal role. Achieving uniform color and clarity is phenomenally challenging, making each piece both unique and technically exceptional. The result is a breathtaking orchestration of the interplay between light, space and time.
With the RM 75-01 Flying Tourbillon, Richard Mille amplifies its legacy of challenging the orthodox, confidently forging a new realm of possibility in watchmaking. Through a breathtaking aesthetic reimagination of the interaction between metal, water and sapphire, the brand cements its role as a vanguard of innovation, boldly charting the future of contemporary horology.
For more information about the RM 75-01 Flying Tourbillon, visit www.richardmille.com.
