Diatom has built its identity around the point where watchmaking, material science and aerospace history meet.
The British independent’s new Inner Worlds collection takes that idea into more ambitious territory, with five automatic watches dedicated to Mercury, Venus, Earth, the Moon and Mars.
Each model pairs a textured, planet-themed dial with either spacecraft material or authenticated meteorite, making the collection less about decorative space romance and more about physical connection.
At a glance
- Diatom has introduced five Inner Worlds watches themed around Mercury, Venus, Earth, the Moon and Mars.
- Each 39.5mm steel watch was carried to 100,000 feet and contains either space-flown spacecraft material or verified lunar or Martian meteorite.
- Every version is priced at £2,200 and limited to 450 pieces.
A British independent with aerospace instincts
Diatom was founded by Dr Alex Baker and Dr Chris Rose, both material science specialists with backgrounds in the aerospace industry.
That experience gives the brand a more technical route into the familiar space-watch category.
Rather than simply using planetary colour palettes or mission-era styling cues, Diatom has leaned into actual materials linked to space travel and planetary science.
For Inner Worlds, every watch has also been transported to 100,000 feet, above the Armstrong Limit, where a human would need a pressure suit to survive outside an aircraft or capsule.
That altitude sits below the commonly accepted boundary of space, but it adds another layer to a project already defined by uncommon materials.
Five dials for five nearby worlds
All five Inner Worlds models use a stainless steel case measuring 39.5mm wide and 9.35mm thick, dimensions that keep the collection firmly in everyday-wear territory.
The dials are the most expressive part of the series.
Diatom creates the base texture by stamping the dial, then embosses finer detail before electroplating and applying enamel layers for colour.
The Mercury edition has a cratered, scorched surface effect, with yellow and blue tones intended to echo the harsh, solar-blasted character of the planet.
Venus moves in a warmer direction, using oranges and reds to suggest the extreme heat hidden below the planet’s dense cloud cover.
Earth is rendered in blue-green shades with a soft wave-like texture, a direct nod to the water that defines the planet from orbit.
The Moon and Mars models take the material story further by placing meteorite on the dial itself.
The Moon edition is coated with NWA 11788 lunar meteorite, while Mars uses NWA 13187 Martian meteorite over a rust-toned terrain texture.
Historic spacecraft material inside the movements
The Mercury, Venus and Earth editions place their space-linked material on the custom rotor of the automatic ETA 2892-A2 movement.
In the Mercury watch, the rotor uses material taken from Liberty Bell 7, the spacecraft used for the second United States crewed suborbital spaceflight in 1961.
Because of the historical nature of the material, it has been stabilised with alloying agents so it can function safely within the movement.
The Venus model uses material from the Atlas-Agena launch vehicle connected to Mariner 2, the 1962 spacecraft that became the first successful planetary science mission.
For the Earth edition, Diatom uses thermal insulation from the Apollo 13 Command Module, one of the most recognisable spacecraft in modern spaceflight history.
Each movement and its custom rotor can be seen through an exhibition caseback.
The Moon and Mars watches shift the emphasis from mechanical display to dial surface, using verified meteorite material from their respective celestial bodies.
That distinction gives the five-watch collection a useful internal rhythm, with three pieces tied to human spaceflight hardware and two tied to planetary fragments that reached Earth.
Details & Specifications
| Brand | Diatom |
|---|---|
| Collection | Inner Worlds |
| Models | Mercury, Venus, Earth, Moon, Mars |
| Case size | 39.5mm diameter, 9.35mm thickness |
| Case material | Stainless steel |
| Dial | Textured enamel finish, with lunar meteorite on Moon and Martian meteorite on Mars |
| Movement | ETA 2892-A2 automatic |
| Power reserve | 42 hours |
| Water resistance | 100 metres |
| Space-linked material | Liberty Bell 7 material for Mercury, Atlas-Agena material for Venus, Apollo 13 Command Module thermal insulation for Earth, NWA 11788 lunar meteorite for Moon, NWA 13187 Martian meteorite for Mars |
| Limited edition | 450 pieces per model |
| Price | £2,200 per model |
Inner Worlds should appeal to collectors who want a mechanical watch with a story that reaches beyond styling alone.
At £2,200, the collection sits in an interesting position for an independent brand, offering proven automatic mechanics, compact steel cases and a material narrative that feels unusually direct.
The limitation of 450 pieces per model is tied to the rarity of the materials involved, which gives the project a practical constraint rather than a purely commercial one.
For anyone drawn to space history, planetary science or simply watches with a tangible reason to exist, Diatom has made one of the more distinctive independent releases in this corner of the market.
