Experience the Cosmos on Your Wrist: A New Era of Horological Innovation

Introducing Yema's Visionary Millésime Collection: Blending Tradition with Astronomical Precision

The Millésime line from Yema exemplifies the brand's highest aspirations in watchmaking, delivering French-made timepieces that feature intricate complications rarely found at this price point, all produced in exclusive, limited runs. Building on the foundation of last year's Superman Tourbillon Millésime CMM.31, the company presents an entirely new creation for 2026, potentially its most ambitious to date: the Spacegraf Heure Sidérale Tourbillon Volant. This watch intricately combines a tourbillon regulator with a celestial display, drawing inspiration from the astronomical observations that were pivotal in establishing Besançon as a hub of French horological artistry. This connection dates back to 1878, when the Besançon Observatory was founded to assist local watchmakers in regulating their instruments with precise astronomical data.

The Spacegraf's Elegant Enclosure: A Fusion of Strength and Refinement

The Spacegraf Heure Sidérale Tourbillon Volant features a 42mm case crafted from Grade 5 titanium, with a slender profile of 12.15mm. The curved case exhibits a sophisticated blend of contrasting brushed finishes and subtle polished accents. The lugs are characterized by sharp, defined angles, while a double-domed sapphire crystal gracefully covers the watch face. The fluted crown, positioned at 3 o'clock, proudly displays the Yema emblem. A transparent sapphire crystal caseback offers an unobstructed view of the intricate movement within. This timepiece also boasts a water resistance rating of 100 meters, ensuring durability and versatility.

A Celestial Dial: Where Horology Meets Astronomy

In stark contrast to the Superman Tourbillon Millésime, which integrated a tourbillon into the robust design of a professional dive watch, the Spacegraf features a dial exclusively dedicated to astronomical themes. Its design revolves around a celestial disc prominently placed at 12 o'clock and a flying tourbillon at 6 o'clock. The black dial boasts a delicate sandblasted texture, overlaid with a black PVD coating, and is encircled by a circular-brushed minutes track marked with double-digit numerals at 5-minute intervals. Beyond the captivating flying tourbillon, the primary highlight is the rotating celestial disc, which completes a full rotation every sidereal day—precisely 23 hours, 56 minutes, and 4 seconds. This sidereal time measurement tracks Earth’s rotation relative to distant stars, offering a unique perspective distinct from the conventional solar day.

Luminous Indications: Guiding Time Through the Darkness

The central hands accurately display the time, complemented by a subtle hand mounted on the tourbillon cage that tracks the running seconds. The hands, the hour-marker ring, the minutes track, the ring encircling the celestial disc aperture, and the graduated frame around the tourbillon all emanate a vibrant dark blue glow. Some of these elements are meticulously crafted from solid Super-LumiNova blocks, ensuring exceptional legibility in low-light conditions and adding a captivating visual dimension to the watch.

The Heart of Precision: Calibre CMM.32 Movement and Robust Design

The new Spacegraf Heure Sidérale Tourbillon Volant is powered by the Calibre CMM.32, a manufacture movement produced in Morteau, France. This caliber builds upon the existing movement architecture utilized in Yema's previous tourbillon models and was developed in collaboration with watchmaker Olivier Mory. A generously sized barrel provides an impressive power reserve of 105 hours. The movement is engineered to withstand significant shocks, vibrations, and accelerations, rated up to 5,000 Gs in all directions. Through the display caseback, the movement reveals a stunning blue finish adorned with a celestial map, while the barrel cover, in a contrasting shade of blue, depicts a world map.

Exclusive Presentation: Limited Edition and Pricing Details

The Yema Spacegraf Heure Sidérale Tourbillon Volant Millésime 2026 is presented on a sleek black leather strap, complemented by matching black stitching and secured with a titanium pin buckle. The strap's lining is elegantly embossed with "Manufacture Française – Fondée en 1948," highlighting its French heritage. This exquisite timepiece is a highly exclusive limited edition, with only 150 pieces available worldwide, and is priced at EUR 14,500.