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Limited Edition of 28 watches



Sideralis is an interstellar inverted double tourbillon, powering an exclusive complication : a sidereal mechanism. This animation displays successively Mars, the Moon, Mercury and authentic meteorites is a hand-crafted universe.

Protected by two patent applications, Sideralis is structured around two especially extraordinary tourbillons:

Special feature number one

Both of these tourbillons are oversized, with cages measuring 14.9 mm – half as big again as the average. This is the largest assembly of two tourbillons ever to have existed. “Aside from our exacting chronometric standards, this approach adds a fascinating visual dimension to the watch; a touch of magic that we’ve decided to gift to lovers of fine watches, just so they can contemplate beauty and horological art in all its splendour,” explains Jean-Marie Schaller.

Special feature number two

The two tourbillons are designed to be physically above the movement – above the dial, even. The two raised cages are large as life and wholly visible, revealing balance wheels with beautifully styled screws – and an absolutely incomparable aesthetic appearance.

Special feature number three

The tourbillons rotate in opposite directions. The continuous coming and going, side by side, is not just for stylistic reasons; the counter-rotation provides the motive power required for the star mechanism – the Sideralis complication.

Now, tourbillons move the planets

For the first time ever, a complication is driven by a double tourbillon: a time dial, situated at 12 o’clock, comprising two discs, one atop the other. The top one features a tiny hand-painted picture. This hand-crafted marvel depicts the universe and its constellations of stars and planets, painted one by one on a dark blue sidereal background. The animation completes one counter-clockwise rotation every 60 seconds.

At 12 o’clock on this upper disc there is a circular opening, through which can be glimpsed the three planets painted on the lower disc, seen to be rotating in the opposite direction at the same speed. The feature represents a wholly new conceptual and artistic approach. 

Mars, Mercury and the Moon – physically present

Through the opening, the lower disc reveals the planet Mars, the Moon, and Mercury in succession. “These three bodies have not been chosen at random,” says Jean-Marie Schaller. “Each of the micro-paintings includes genuine dust from the heavenly body in question: a fragment of Mars, moon dust, and extremely rare fragments of the Rosetta Stone, whose scientific name is Sahara 99555. This stone has travelled across the universe to reach us: it’s the oldest known to mankind, believed by the scientific community to have come from Mercury and to be four and half billion years old. Fragments of meteorites from Mars, the Moon and Sahara 99555 also appear on the lower disc, positioned between the planets, floating in the cosmos, or included in a hand-painted shooting star.”

The inverted double tourbillon, powering an exclusive complication, is an unprecedented innovation, with two patents pending to protect it. The Sideralis caliber is also fully exclusive to Louis Moinet, mounted on a hand-painted aventurine dial that matches the universe depicted on the time disc. Sideralis comes in a 47.4 mm grey gold case – and in a limited edition of just 28 watches.

> More Technical specifications

Technical specifications

Sideralis is an interstellard inverted double tourbillon, powering an exclusive complication : A sideral mechanism.

  • Features and indications

    Double Tourbillon 60-seconds

    Hours & Minutes at 12 o’clock

  • Dial and Hands

    Hour & Minute “Gouttes de Rosée” dew-drop hands

    Lacquered dial with Clou de Paris concentric pattern

    Fleur-de-lys applique

  • Movement and Finishing

    Manual double tourbillon movement

    237-part LM47 caliber, manufactured by Louis Moinet

    Winding: Manual

    Tourbillon cage: 1 rotation/minute

    Oscillations: 21,600 vibrations per hour

    Frequency: 3Hz

    Balance wheel: Glucydur

    Lines: 13¾  

    Power reserve: 52 hours

    Jewels: 36

    Diameter: 37.60 mm

    Height: 9.85 mm

    Decoration: Satin-brushed baseplate and bridge flanks

    Polished chamfers and countersinks

    Sunburst Côtes de Genève motif adorning the bridges

    Polished screw heads

    Rhodium-plated bridges and baseplate

    Polished Louis Moinet logo  

  • Case and Strap

    Case: Original Louis Moinet® design comprising 53 different elements

    Material: 18K gold

    Diameter: 47.4 mm

    Thickness: 14.92 mm

    Water resistance: 30 metres

    Case back: Fitted with 7 screws, engraved with individual number and Louis Moinet symbols

    Crystals: Two sapphire crystals with non-reflective coating on both faces

    Crown protection: Patent pending

    Distance between lugs: 24 mm

    Strap: Hand-sewn Louisiana alligator leather with alligator lining

    Buckle: 18K gold folding clasp with fleur-de-lis motif

Inverted Double Tourbillon
Designed to be physically above the dial, the oversized tourbillons rotate in opposite directions
Sidereal Complication
The complication is driven by the double tourbillon and displays successively The Moon, Mars and Mercury
Neo case
Sideralis comes in a brand new 47.4 mm 18K gold case, with open-work lugs
Micro Paintings
Made from aventurine, the dial is entirely hand-painted and depicts a realistic universe