- Size
- 32.90 × 46.75 × 14.35 mm
- Edition
- 15 pieces
Overview
The fully transparent execution
The clear version of the RM 75-01 is made entirely from colourless sapphire, with a surface texture Richard Mille relates to the motion of waves. It is the largest of the three editions at 15 pieces.
The photograph shows the red gold flange and the skeletonised movement through the transparent case, with green accents on the flange markers and a turquoise collar under a gem-set crown. Richard Mille pairs this execution with a sea-green strap, evoking tropical seabeds; the strap in the photograph reads as very pale green or off-white, so the colour is described as seen rather than asserted.
The RM 75-01 Flying Tourbillon Sapphire was introduced in April 2025 as three limited editions. Richard Mille made its first all-sapphire case in 2012; what is new here is that the movement was conceived FOR the sapphire case from the start rather than adapted to it. Cécile Guenat’s team drew on Gothic ribbed vaults for the structure and on water for the colours.
Key details
Design and engineering
- Calibre RM75-01Manual winding flying tourbillon movement with hours and minutes, running at 21,600 vph (3 Hz) with around 65 hours (± 10%) of power reserve.
- Flying tourbillon and flying barrelAssembled without upper bridges, which in a fully transparent case leaves the mechanism visible from every angle.
- Skeletonised baseplate and bridgesGrade 5 titanium, treated in 5N gold and grey PVD. The multilevel baseplate anchors the wheels, tourbillon and barrel; the wheels are rhodium treated.
- Sapphire caseBezel, caseband and caseback are milled from solid blocks of synthetic sapphire, a material second only to diamond in hardness. Richard Mille records over 1,000 hours of machining and polishing per case, of which around 430 hours are preforming and 350 hours polishing, with anti-glare treatment on both faces of the front and back crystals.
- Free-sprung balance with variable inertiaThe regulator index is eliminated in favour of four adjustable screws on the balance.
- Winding-barrel teeth and third-wheel pinion with a central involute profileGiving an optimal pressure angle of 20°, which Richard Mille specifies for torque transmission and for compensating variations in the engagement of the going train.
- Upper flange5N red gold, microblasted, resting on satin-polished titanium pillars, with polished and microblasted steel markers and luminous index points.
Specifications
Technical specifications
| Reference | RM 75-01 |
|---|---|
| Calibre | RM75-01, manual winding flying tourbillon, skeletonised |
| Functions | Hours, minutes |
| Power reserve | Around 65 hours (± 10%) |
| Frequency | 21,600 vph (3 Hz) |
| Baseplate and bridges | Skeletonised grade 5 titanium, 5N gold and grey PVD |
| Tourbillon | Flying, at 6 o’clock, no upper bridge |
| Barrel | Flying, fast rotating, no upper bridge |
| Balance | Free-sprung, variable inertia, 4 adjustable screws |
| Going train | Central involute profile, 20° pressure angle |
| Wheels | Rhodium treated |
| Upper flange | 5N red gold on satin-polished titanium pillars |
| Case dimensions | 32.90 × 46.75 × 14.35 mm |
| Case machining | Over 1,000 hours per case |
| Case assembly | 24 grade 5 titanium spline screws, 316L washers |
| Crown | Gem-set |
| Crystal | Sapphire, anti-glare both sides, front and back |
| Water resistance | 30 m, two nitrile O-ring seals |
| Case material | Clear synthetic sapphire, tripartite |
| Strap | Rubber, very pale green |
| Edition | 15 pieces |
| Introduced | 2025 |
Buying with HYPA
Purchase with confidence
- Manufacturer warranty confirmed from the warranty card
- Insured worldwide delivery
- Payment by bank transfer or cryptocurrency
- Registered Australian dealerHYPA International Pty Ltd · Victorian Second-Hand Dealer Licence SHD-0018017.
- Direct specialist supportSpeak with the HYPA team before, during and after the purchase.
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