Blastoff For The Space-Going Barrelhand Monolith — A Next-Generation Mission-Grade Space Watch

There are tool watches, and then there are watches that make conventional tool watches look almost quaint. The Barrelhand Monolith belongs in the latter category. This timepiece took six years to develop. Aerospace engineering, additive manufacturing, and advanced materials science were used to create not simply a “space-inspired” watch but an actual instrument for modern spaceflight. The Monolith meets ISO aerospace standards, was constructed in accordance with NASA material guidance, and withstood EVA/IVA testing protocols. This watch’s spec list tells you you’re dealing with mission-grade hardware and nothing less. Fascinating stuff, right?

Two years ago, I wrote about the conception and first phases of the Barrelhand Monolith. In that article, I wrote that the case — or the chassis, as Barrelhand calls the “air frame” that holds the movement — had already made it to the Moon. And it’s still there. It traveled there on board the Nova-C lunar lander Odysseus — “Odie” for short. Odie left our home planet with stuff from the outdoor brand Columbia, artist Jeff Koons, and a Monolith chassis on board, and it landed on the Moon’s surface on February 22nd, 2024. Two years later, the watch is ready, and the Barrelhand Monolith is ready for blastoff — this time, for real.

Blastoff for the Barrelhand Monolith

So, a prototype of the Monolith’s chassis is on the Moon, but the ones that hold the movement are here on Earth and ready to go where few have gone before. The Monolith chassis on the Moon is made of ultra-light 3D-printed aerospace-grade Ti-6Al-4V. The manufacturing approach was similar to that of reusable rockets, such as the SpaceX Falcon 9. The chassis going into production, however, is different. The 3D-printed and skeletonized 38 × 45 × 11.8mm chassis launching today is made from Scalmalloy. That exotic material is a patented, high-strength aluminum-magnesium-scandium alloy specifically developed for additive manufacturing (3D printing). It’s an airworthy alloy originally patented by APWorks, a subsidiary of the Airbus Group. Scalmalloy combines the lightness of aluminum with the strength and ductility of titanium. It’s perfect for a space-going watch.

The Barrelhand Monolith, with its angular shapes and modest dimensions, weighs just 31 grams without the strap. That is astonishingly light for something pressure rated from vacuum to 20 atm, with operational tolerances spanning from -120°C to +120°C, and resistant to shocks equivalent to 3,000 g. The case construction itself is particularly interesting. Barrelhand integrates an “Aircore” insulation chamber to provide more than 10 times the insulation of a comparable steel case. It’s one of those details that sounds excessive until you remember the intended operating environment. Another one is the oversized 8mm “Airlock Crown.” It follows the same philosophy. With an International Orange anodized finish, it functions flawlessly underwater or in vacuum conditions while remaining usable with gloves.

Space lasers

As you can tell, the case/chassis is pretty special. The dial is still a dial, but it deserves special attention as well. Barrelhand calls it Monolithic Aerolight X2 Ceramic, and it’s a laser-welded ceramic structure using plenty of Swiss Super-LumiNova C3-X2. Barrelhand chose this lume as it is roughly four times as bright as standard silk-screened C3-X1 after one hour.

More importantly, the dial avoids paints and adhesives altogether, reducing potential failure points during EVA (extravehicular activity).

Maybe the most down-to-earth aspect of the Barrelhead Monolith is the movement that powers it. The M1 Engine is a Sellita SW300-1b-based caliber. It was heavily modified for the application, though. Specifications include a 4Hz Glucydur balance, nickel-phosphorus escapement components, and a 50-hour power reserve. And the resistance to magnetic fields was boosted up to ISO 764/DIN 8309 standards. The most remarkable feature is how the movement sits in the case. It is suspended within an engine-mount system to isolate it from both shock and external temperature transfer.

A watch carrying a message

Yes, the Barrelhead Monolith has an open-worked chassis in Scalmalloy with a suspended movement inside, but these features are not the watch’s most unusual aspects. That unofficial reward goes to the Memory Disc Module integrated into the case back. It’s a 1.4g NanoFiche archive capable of storing 3GB of cultural material for over a millennium. Indeed, the space-going Monolith carries a message. The NanoFiche holds UNESCO translations, curated artworks, children’s paintings, Richard D. James sound artifacts, and even the original French edition of Le Petit Prince. It sounds eccentric at first, but Barrelhand frames it less as novelty and more as psychological infrastructure for long-duration missions.

The idea behind the Memory Disc Module is to preserve identity and cultural continuity during deep-space travel. I thought it was to show the aliens you encounter during your space explorations where you’re from, but apparently, it is not. Once leaving the Milky Way behind, the space traveler needs to be reminded of home.

Tried, tested, and serviced

Interestingly, the watch has already been tested in space. In 2025, astronaut Gökhan Erdem wore the Monolith beyond the Kármán line aboard a Blue Origin NS-34 mission. Separately, variants of the Memory Disc have already reached the lunar surface on missions in both 2024 and 2025.

What about servicing your space watch, you ask? Well, on Earth, things are simple. Barrelhand plans to release key Monolith design files and technical documentation as open-source reference, so watchmakers everywhere can help you out with a problem. In space, it will be a DIY job, but when you have the Monolith’s manual downloaded on your laptop, you can figure it out yourself. Speaking of DIY, hardware-wise, the watch uses Torx screws (T15, T6) on the case back and strap bar, and these are compatible with existing ISS toolsets that are optimized for driver stability in microgravity.

Final words on the Barrelhand Monolith

Two years after its announcement, the watch is finally here. Why did it take so long? Well, Karel Bachand, Barrelhand’s founder and CEO, summarized the development process succinctly: “Every design decision was driven by aerospace engineering principles — building it felt closer to engineering a spacecraft than a watch.” That may sound a little dramatic, but now you know more about the materials used and the certification. He’s not exactly exaggerating. The Barrelhand Monolith really is a mission-grade space watch.

In case you want to take one with you on your maiden space flight, you can pre-order the Monolith through Barrelhand’s official website now. It retails for US$9,750, and orders should ship in the fourth quarter of this year. That leaves you just enough time to work on your physique and mentally prepare for venturing into space.