Louis Moinet Cosmopolis

The microcosm of the macrocosm: Louis Moinet Cosmopolis

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Thursday 21 September, 2023: History of Science Museum, Geneva – the COSMOPOLIS evening: When watchmaking incarnates the universe and clinches a world record – Louis Moinet Cosmopolis.

Louis Moinet Cosmopolis

The unforgettable COSMOPOLIS evening was held in the magnificent Villa Bartholoni, an architectural gem of the nineteenth century.  The Grand Salon inside this delightful setting was the venue for a unique experience that harmoniously wove together the disciplines of science, art, and watchmaking.

Louis Moinet Cosmopolis

The atmosphere was one of mystery, as Jean-Marie Schaller, CEO and Creative Director of Les Ateliers Louis Moinet, revealed the secret of the “microcosm of the macrocosm” through his masterpiece:  the COSMOPOLIS. This unique timepiece features twelve distinct meteorites, each telling a fascinating and unique story.

Louis Moinet Cosmopolis

Ms. Seyda Subaci-Gemici, adjudicator of the GUINNESS WORLD RECORDS™, was the surprise guest. She honoured the COSMOPOLIS with the title “Most meteorite inserts in a watch.” It’s the third GUINNESS WORLD RECORDS™ title for Les Ateliers Louis Moinet and the first fore one of its contemporary works. It celebrates the unique character of the timepiece and highlights the innovation and creativity that went into shaping it.

Louis Moinet Cosmopolis

The guests had the opportunity to delve deep into the development of the COSMOPOLIS thanks to a holographic display case.  This immersive experience was enhanced by an exhibition of meteorites from Jean-Marie Schaller’s own collection, which highlighted the rarity and nobility of these heavenly rocks.

Louis Moinet Cosmopolis

They also looked on in amazement as Louis Moinet, the watchmaker himself, seemed to have gracefully travelled through time, as if guided by cosmic forces, to join in this wonderful evening…

Louis Moinet Cosmopolis

When watchmaking embodies the universe in a single timepiece, time itself stands still unveiling a new world of possibilities that bring together the heritage of the past with the promise of a limitless future.

Louis Moinet Cosmopolis

When watchmaking incarnates the universe in a unique timepiece and is honoured with a GUINNESS WORLD RECORDS™ title for “the most meteorite inserts in a watch”.

“I’ve been collecting exceptional meteorites for twenty years. Each has its own story.  My collection contains rare pieces, like the lunar meteorite Dhofar 461, which is known for its white-speckled interior. And I have a valuable meteorite from Mars that is one of 300 samples identified to this day. I also have the famous Allende, the oldest rock in the solar system, and Erg Chech, the oldest magmatic rock known, which comes from a protoplanet that vanished at some point. As for the Jbilet Winselwan, what makes it remarkable are the traces of amino acid, which might well be the first signs of life in the cosmos. The Sahara 97093, on the other hand, distinguishes itself through its micro-diamonds, which took shape at the heart of stars that exploded and became supernovas. These fascinating stories were the creative spark that gave birth to the COSMOPOLIS. Even more than a great watchmaking work, COSMOPOLIS is a historic and scientific journey, a microcosm of the macrocosm.”

Jean-Marie Schaller, owner and creative director
Louis Moinet Cosmopolis

The Genesis of a Magnus Opus

The story actually begins well before our times in the mysterious confines of outer space. Meteorites, some older than Earth itself, travelled billions of miles through space and ultimately found a home on our planet. Imagine these rocks coming from another world… They are of such unique composition that the price per gram surpasses that of gold and platinum combined. Just think of these materials that bore witness to the shaping of our solar system, that contain the first known traces of life in the cosmos. They can tell us stories of the stars that we are just beginning to comprehend.

Today, after their interstellar journey, these heavenly treasures have been assembled by Les Ateliers Louis Moinet into a unique timepiece: COSMOPOLIS.

Louis Moinet Cosmopolis

A GUINNESS WORLD RECORDS™title for “the most meteorite inserts in a watch”

The COSMOPOLIS is in the spotlight on Thursday, 21 September, in Geneva, Switzerland. It is receiving a prestigious GUINNESS WORLD RECORDS™ title for “the most meteorite inserts in a watch” This means that Les Ateliers Louis Moinet will from now on be known beyond the borders of traditional watchmaking, where it will generate amazement for its sheer rarity globally.

This world record will also confirm the boundless creativity of Jean-Marie Schaller and his ability to generate emotions and make us dream. This title also reflects his deep gratitude towards his solid network of friends, passionate supporters, and craftsmen who contribute daily to the development of Louis Moinet watches.

Louis Moinet Cosmopolis

COSMOPOLIS, an evocative name

The name COSMOPOLIS pays tribute to the connection between our world and the infinite universe. The prefix cosmo- suggests the sheer size of the cosmos, the stars, their mysteries. The suffix -polis suggests the cultural and artistic spirit of the cities. Together, the name COSMOPOLIS embodies the very essence of this watch by merging the fascination for space with the timeless elegance of the watchmaking craft.

Louis Moinet Cosmopolis

Twelve meteorites: An exceptional constellation

An aura of mystery emanates from the COSMOPOLIS. The time appears subtly between the meteorites, drawing the eye at each glimpse and inviting one to explore a cosmic microcosm. The dial itself is the stage for a veritable celestial theatre. Each fragment of meteorite has been placed so as to create a unique and fascinating constellation. In the centre is the rarest and most captivating stone of all, a lunar meteorite. One of these outstanding fragments, a black chondrite, is located in the back of the tourbillon cage, the beating heart of the mechanism. It’s a reminder of the powerful cosmic forces that have forged our universe.

Ten other special fragments have been carefully disposed, each on its own base that is discreetly attached to dark-grey, brushed dial. Each of celestial gems, is a witness to the origins of our solar system, each tells a billion-year-old story, one that includes the extraordinary voyage that them right to the COSMOPOLIS.

These slivers of history, these glimpses of eternity, these slices of the cosmos, this constellation of meteorites fuse space-time and the world of watchmaking to create the rarest work of art.

Louis Moinet Cosmopolis

COSMOPOLIS meteorites description

1. Lunar meteorite, Dhofar 461

Origin: Moon
Found near Dhofar, Oman

Dhofar 461 is an extremely rare specimen of lunar meteorite, characterised by a white-speckled interior. There are currently only 300 recorded lunar meteorites, all of which have been ejected from the Moon during the past 20 million years. On their way to Earth, some of them orbited the sun first before entering Earth’s orbit and atmosphere, where they turn into shooting stars. Their lunar origin has been confirmed by rigorous mineralogical comparisons, their chemical isotopic composition, and with samples collected during the Apollo missions to the Moon.

2. Martian meteorite, Dhofar 1674

Origin: Mars
Found near Dhofar, Oman

Dhofar 1674 is one of the rarest Martian meteorites. It has an extremely special greenish texture. Like most meteorites, Dhofar 1674 was found in the desert, where its blackened exterior contrasts sharply with the surrounding sand. To date, fewer than 300 Martian meteorites have been identified worldwide. This meteorite costs more per gram than gold and platinum combined.

3. Allende meteorite

Origin: Meteorite shower
Found in Mexico

The Allende is the most studied meteorite in history. In fact, it has been dubbed the “Rosetta Stone” for the wealth of information it has provided on the formation of the solar system. It is estimated to be 4.567 billion years old and thereby the oldest rock in the solar system.

4. Erg Chech meteorite

Origin: Asteroid
Found in Algeria

Erg Chech comes from a volcanic rock and is the oldest magmatic rock known to date. It originated from a protoplanet that has since disappeared, and it is older than the Earth itself. After a journey of more than 4 billion years, it landed about a hundred years ago in southern Algeria, in the Erg Chech sea of sand, whence its name. Amond the 65,000 recorded meteorites in the world, none share its unique composition. It has an especially stunning appearance that combines green and brown hues and a surface look brought about by a lava flow.

5. Jbilet Winselman meteorite

Origin: Asteroid
Found in Morocco, in the western Sahara Desert

This mysterious Jbilet Winselwan meteorite contains traces of amino acids, that are probably the first known traces of life in the cosmos.

6. Isheyevo meteorite

Origin: Asteroid
Found in Russia

The Isheyevo meteorite is a carbonaceous chondrite containing a beautiful sequence of fine layers.

7. Aletai Armanty meteorite

Origin: Asteroid
Found in China

This meteorite used to be known as Armanty, but is now known under the name Aletai. It is composed of a natural and extraterrestrial mix of iron and nickel. It comes from the heart of an asteroid weighing over one-hundred tons.

8. Aguas Zarcas meteorite

Origin: Meteorite shower
Found in Costa Rica

The Arguas Zarcas meteorite is part of a meteorite shower that fell in a rainforest in central Costa Rica on April 23, 2019.

9. Gibeon meteorite

Origin: Asteroid
Found in Namibia

The Gibeon meteorite landed in Namibia in prehistoric times. It was named after the nearest city. It is famous for the distinctive Widmanstätten pattern, which is typical for extraterrestrial ferrous rocks.

10. Toluca meteorite

Origin: Asteroid
Found in Mexico

This meteorite probably struck Earth over ten millennia ago. For centuries, Mexicans living near meteorites have used them as a source of metal for various tools. The Toluca meteorite fragments were discovered by the conquistadores in 1776.

11. Sahara 97093 meteorite

Origin: Asteroid
Found in the Sahara Desert

This extremely rare Enstatite EH3 meteorite features microdiamonds of interstellar origin. They are formed in the heart of stars that exploded and became supernovas.

12. Black L5 chondrite meteorite

Origin: Asteroid
Found in the Sahara Desert

This black chondrite is a highly shocked meteorite, the result of a gigantic impact in space between two asteroids. Chondrites are considered the first elements that go on to become planets.

Louis Moinet Cosmopolis

Haute horlogerie and the flying tourbillon

To defy gravity in a particularly spectacular way, COSMOPOLIS comes with an off-centre tourbillon in the subdial at 6 o’clock. The movement is hand-wound, with two barrel springs, providing an impressive ninety-six hours of power reserve. The system, known as “volte-face,” places one barrels upside-down over the other. This allows them to deliver their energy simultaneously for a ninety-six hour power reserve.

  • Louis Moinet Cosmopolis
  • Louis Moinet Cosmopolis

A noble case of rose gold

It comes in an 18-ct, 5N rose-gold case with a diameter of forty millimetres. The lines are fluid and taut at the same time. The highly technical sapphire crystal dome reveals the many fascinating facets of the meteorite fragments below. As for the openworked lugs, they emphasise the smooth integration of the bracelet.

Louis Moinet Cosmopolis
Louis Moinet Cosmopolis Ref. LM-135.50.CO

Louis Moinet Cosmopolis Technical Sepcifications

Ref. LM-135.50.CO – Unique piece


  • Functions: Hours, Minutes, Flying tourbillon
  • Complication Flying tourbillon
  • Type Hand-wound with double barrel
  • Oscillations 28,800 vibrations per hour
  • Rubies 26
  • Power reserve 96 hours
  • Water resistance 30 metres


  • Material 18-carat 5N rose gold, polished and satinated
  • Diameter 40.7 mm


  • 12 meteorites
    • DHOFAR 461 – Moon (Oman)
    • DHOFAR 1674 – Mars (Oman)
    • ALLENDE – Meteorite shower (Mexico)
    • ERG CHECH – Asteroid (Algeria)
    • JBILET WINSELMAN– Asteroid (Morocco)
    • ISHEYEVO – Asteroid (Russia)
    • ALETAI ARMANTY – Asteroid (China)
    • AGUAS ZARCAS– Meteorite shower (Costa Rica)
    • GIBEON – Asteroid (Namibia)
    • TOLUCA – Asteroid (Mexico)
    • SAHARA 97093 – Asteroid (Sahara Desert)
    • BLACK CHONDRITE L5 – Asteroid (Sahara Desert)
  • Hands Hours, minutes, facetted and skeletonised, with luminescent matter

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