Mu:n Watch: Starry Night 38 mm Nde91

First batch: September delivery (sold out)

Second batch: December delivery

Mu:n: the Nuit des Étoiles, a watchmaking creation dedicated to astronomy

The Mu:n Nuit des Étoiles NDE91 is arguably one of the most ambitious creations ever produced by Mu:n, a young French brand. Developed in official partnership with the Association Française d’Astronomie (AFA) for the 2026 Nuits des Étoiles event, this limited edition of 300 pieces celebrates the historical link between astronomy and watchmaking. The Nuit des Étoiles transforms the night sky into a true mechanical work of art to be worn on the wrist.

The Mu:n Nuit des Étoiles is distinguished by its dial architecture, constructed on three levels. At the center, an impressive relief moon disc occupies a place of honor. Created using high-precision (micron-accurate) femto-laser technology, the moon features relief perceptible to the naked eye and benefits from SuperLuminova BGW9 treatment. True to the Mu:n DNA, this Nuit des Étoiles blends technical innovation, emotion, and astronomical poetry.

The dial of the Nuit des Étoiles reproduces with micrometric precision the exact map of the sky observed during the first edition of the Nuits des Étoiles in 1991. The brightest stars are engraved deeper to reveal the Super-LumiNova placed beneath the dial, allowing the constellations to appear naturally in the dark. The Mu:n Nuit des Étoiles thus becomes a true map worn on the wrist.

Powered by a Swiss Sellita SW288 manual caliber modified specifically for this edition, the Mu:n Nuit des Étoiles benefits from reworked architecture to significantly enlarge the moon display. The orbital seconds hand was imagined as a satellite moving around the central moon, further reinforcing the unique identity of this Nuit des Étoiles, while also enhancing its legibility.

The 38 mm case of the Mu:n Nuit des Étoiles offers particularly balanced proportions and excellent comfort on the wrist, notably with a thickness of 11.6 mm. Combined with its double-domed sapphire crystal and 100-meter water resistance, the Nuit des Étoiles perfectly marries horological sophistication with everyday use.

Technical specifications

• Brand: Mu:n
• Model: Nuit des Étoiles
• Reference: NDE91
• Movement: Swiss manual-winding mechanical
• Caliber: Modified Sellita SW288
• Functions: Hours, minutes, orbital seconds, moon phase
• Frequency: 28,800 vibrations/hour (4 Hz)
• Jewels: 18
• Power reserve: 41 hours
• Adjustment: +/- 7 seconds per day
• Case: 316L stainless steel
• Diameter: 38 mm
• Lug-to-lug: 46 mm
• Thickness: 11.6 mm
• Crystal: Double-domed sapphire
• Dial: Three-level construction with cold enamel finish
• Moon disc: Femtosecond laser-engraved relief, SuperLuminova BGW9
• Special feature: Exact mapping of the sky from the 1991 Nuits des Étoiles
• Water resistance: 100 meters (10 ATM)
• Strap: French-origin blue calf leather
• Additional strap: 5-link steel bracelet
• Limited edition: 300 numbered pieces
• Mu:n warranty: 2 years

Why choose this watch?

The Mu:n Nuit des Étoiles NDE91 is ideal for enthusiasts of astronomy, watchmaking mechanics, and independent French micro-brands. Its relief moon disc, luminescent celestial map, and orbital seconds hand make it a truly unique moon phase watch on the market.

The Mu:n Nuit des Étoiles combines innovation, emotion, and Swiss craftsmanship in a particularly exclusive limited edition. A Mu:n watch designed for those who wish to wear a true piece of the sky on their wrist.

About the Mu:n brand

Founded in France, Mu:n develops watches inspired by astronomy and space exploration. The brand quickly distinguished itself through its original creations featuring the moon phase as a central design element. Each Mu:n project combines technical innovation, storytelling, and a passion for observing the sky.

With the Nuit des Étoiles, Mu:n takes this philosophy even further by creating a watch that celebrates the dialogue between the infinitely large in astronomy and the infinitely small in watchmaking.