YEMA's Spacegraf Heure Sidérale Tourbillon pairs a flying tourbillon with a sidereal-time celestial disc in a 42mm titanium case. Limited to 150 pieces at €14,500.
The Working Brief
- Priced at €14,500, the Spacegraf Heure Sidérale Tourbillon (SKU 60.26.32.06.TEL.L6) places a flying tourbillon and a rotating sidereal celestial disc within a 42mm Grade 5 titanium case just 12.15mm thin, limited to 150 numbered pieces.
- The celestial vault disc at 12 o’clock completes one rotation every 23 hours, 56 minutes and 4 seconds, showing the actual stars visible above the wearer at any moment.
- The CMM.32 calibre, manufactured in Morteau, France, delivers 105 hours of power reserve and withstands shocks up to 5,000 Gs.
- All indices, hands and the celestial disc carry Grade X1 Super-LumiNova BGW9 in 3D form, so the entire sky-map glows through its full depth after dark.
flying tourbillon at 6 o’clock” style=”width:100%;height:auto;display:block;border-radius:8px;” />Design & Mechanics
Forty-two millimetres in Grade 5 titanium, vertically brushed on the case flanks and finished with a circular-brushed bezel: the Spacegraf keeps its profile to 12.15mm despite accommodating two distinct complications. A double-domed sapphire crystal above and a sapphire caseback below make the movement legible from both faces simultaneously. The case references the Besançon Observatory, which was built in 1878 specifically so that the region’s watchmakers could regulate their instruments against the stars rather than rely on calculation.
The dial is deep black, sandblasted beneath a black PVD coating. Circular-brushed minute and seconds tracks ring the outer zone, while 3D-ring indices merge flush with the surface. Both hands and markers are solid blocks of Grade X1 Super-LumiNova BGW9, chosen because the material glows through its entire depth rather than merely its surface.
Movement & Materials
The CMM.32, short for Calibre Manufacture Morteau 32, houses the sidereal time complication at its upper register and the flying tourbillon at 6 o’clock. At 12 o’clock, a thin sapphire cover shading from smoky to clear sits above the celestial vault disc: a rotating star map that turns once every 23 hours, 56 minutes and 4 seconds, exactly the period the Earth takes to complete one axial rotation relative to the fixed stars. The disc shows the portion of sky actually overhead at any moment, the same reading the Besançon Observatory extracted nightly from its meridian circle.
The flying tourbillon below is supported solely at its base, with no upper bridge, which demands perfect component balance and lightweight materials throughout. YEMA states the calibre resists shocks and vibrations up to 5,000 Gs in all directions. A large barrel extends power reserve to 105 hours.
Market Position
At €14,500, the Spacegraf Heure Sidérale Tourbillon occupies a considered position for a flying tourbillon paired with a genuine astronomical complication. Production is fixed at 150 numbered pieces under YEMA’s Millésime designation, reserved for the manufacture’s most demanding annual release. For collectors in the Gulf and across Europe, the edition number and the technical specification make this among the more precisely defined French independent propositions at this price tier.
| Movement | CMM.32 Calibre Manufacture Morteau 32, flying tourbillon, 105-hour power reserve, shock-resistant to 5,000 Gs |
| Case size | 42mm diameter, 12.15mm thickness |
| Case material | Grade 5 titanium, vertically brushed with circular-brushed bezel |
| Dial | Deep black sandblasted with black PVD; sidereal celestial vault disc at 12 o’clock; flying tourbillon aperture at 6 o’clock; Super-LumiNova BGW9 Grade X1 indices and hands |
| Price | €14,500 |
| Availability | On request from the maison or an authorised retailer in the Middle East |
Stay ahead of the latest releases. Subscribe to our newsletter for editor-curated coverage of luxury timepieces for collectors in Europe and the Middle East.
Frequently Asked Questions
What is the price of the YEMA Spacegraf Heure Sidérale Tourbillon?
The Spacegraf Heure Sidérale Tourbillon is priced at €14,500. It carries the SKU reference 60.26.32.06.TEL.L6 and forms part of YEMA's Millésime 2026 limited-edition line.
How many pieces of the YEMA Spacegraf Tourbillon are being produced?
Production is strictly limited to 150 numbered timepieces, making it the most limited release within YEMA's Millésime programme for 2026.
What is the sidereal time complication on the Spacegraf dial?
The celestial vault disc at 12 o'clock completes one full rotation every sidereal day, precisely 23 hours, 56 minutes and 4 seconds, the period the Earth takes to rotate once relative to the stars. At any given moment it displays the portion of the sky actually visible above the wearer, referencing the same observational method used at the Besançon Observatory since 1878.
Where is the CMM.32 calibre manufactured?
The CMM.32, standing for Calibre Manufacture Morteau 32, is produced in Morteau, a town in the Franche-Comté region of France, the traditional cradle of French watchmaking.
Is the YEMA Spacegraf Tourbillon available in the Middle East?
YEMA has not named a specific regional retailer in its press communication. Collectors in the region may contact the manufacture directly at [email protected] or approach an authorised YEMA retailer for acquisition details.
