Yema sets a 4.5-billion-year-old meteorite into its new Navygraf CMM.10

Yema has introduced the Navygraf Meteorite CMM.10, a dive watch whose dial is cut from Muonionalusta meteorite, a material the French brand says formed roughly 4.5 billion years ago in the metallic core of an early planetoid.

The watch is limited to 150 individually numbered pieces, offered in black or green, and the circularly brushed titanium section around the caseback display window carries each piece's limited-edition number alongside its serial number.

The case is titanium, 39mm across, 11mm thick and 46mm lug-to-lug, with a vertically brushed finish and mirror-polished bevels along the lugs. A 120-click unidirectional bezel carries a black stainless-steel insert with a 0-60 minute scale for timing elapsed dives.

A 2.2mm double-domed sapphire crystal keeps the vintage-style curved profile of earlier Navygraf models while protecting the meteorite dial beneath it. Water resistance is rated at 300 meters, which Yema positions as a cleaner, more restrained take on its longstanding Superman dive watch.

Why a meteorite dial looks different every time

Muonionalusta is one of the oldest known meteorites, an iron-and-nickel body that cooled over millions of years to form the Widmanstatten pattern visible once the material is cut and polished. Yema says the pattern shifts as light crosses the dial, making each of the 150 watches visually distinct from the next.

Against that pattern, Yema applies hour markers and hands in Grade A BGW9 Super-LumiNova with blue emission, alongside a white minutes and seconds track around the dial's edge. The bezel's 12 o'clock triangle is also luminescent, matching the tool-watch legibility Yema builds into the rest of the Navygraf range.

A sapphire window on the caseback exposes the CMM.10 movement, Yema's automatic manufacture caliber with a central rotor, developed with Olivier Mory and assembled by the brand's watchmakers in Morteau, France. It is the same manufacture movement Yema developed for its Marine Nationale edition, the Navygraf Marine Nationale CMM.10, rather than a bought-in caliber.

The caliber runs at 28,800 vibrations per hour with a 70-hour power reserve, aided by an oversized barrel. Yema specifies chronometric accuracy of minus 3 to plus 5 seconds per day, along with elevated resistance to magnetic fields and shocks, figures the brand quotes for the movement generally.

The watch ships on a titanium bracelet, vertically brushed to match the case, measuring 19mm at the lugs and closed with a folding clasp that includes micro-adjustment. Pricing is set at EUR 2,900, or USD 3,350, with full details listed at yema.com.

What Yema has tried on the Navygraf before

Yema has spent recent releases pushing the Navygraf beyond its original tool-watch format, trying forged carbon and mother-of-pearl on dials and bezel inserts before turning to a natural material with no two examples alike.

We have tracked a similar move elsewhere in the category this year: our coverage of Nivada Grenchen's F77 MKII noted the brand marking its centenary with stone dials, another case of an established dive-watch maker reaching for a material outside metal or lacquer to mark a specific release.

Limited-edition tool watches built around unusual materials are part of a broader shift we have followed across watches and jewelry, where brands increasingly use rare stone, carbon or meteorite to differentiate a familiar case shape rather than redesigning the watch itself.

That pattern extends beyond watches into our coverage of style more broadly, where meteorite has surfaced as a material choice in categories as far removed as footwear, underscoring how a single rare substance can move across product categories once a maker decides it is worth sourcing.

Yema has given no date for when the 150 pieces go on sale beyond confirming pricing and availability through its own site, and has not said whether the black and green versions will be produced in equal numbers within the run, or how the individual numbering is split between them.