LAB-ONE Steel 904 L


Steel is the traditional watchmaking material. It is the watchmaker’s metal of preference that was the foundation for all modern watches. What we wanted with our steel model was to go back to classic watchmaking.

A steel watchcase for an elegant model with a classic touch. One-piece dark blue metal and aramid weaving for the bracelet.

Price: € 13’850, -  Excl tax
Limited to 49 Watches
Deliveries: November 2023

What really matters about this watch

We will not tell you here how our hybrid movement makes LAB-ONE a world first... Why dwell on the precision and complexity of the caliber, which makes LAB-ONE the only mechanical watch that does not lose its time, when we can talk about the prestige and the obvious social rank that this watch will give you?

 "Knowing how LAB-ONE came to be a product of impeccable quality is not important. The shuttle shape and the exclusive comfort it brings or the multitude of parts of the dial as well with a grid that reproduces the web of space-time and that creates an impression of depth..." This is a pompous sales pitch that doesn’t tell you what’s what. What matters is that you can have this luxury watch before your neighbor (who happens to have a bigger car than you)

Finally, the fact that it lights up when you want it and that it is the only wristwatch that makes SuperLuminova™ lose face… you don't care about that, don’t you? No, what matters is that LAB-ONE will make others green with envy when they see it resting on your wrist.

As you have gathered, LAB-ONE is the timepiece that is missing from your collection. If ever your interest in learning more is piqued, the links can be found here.

Caliber HYB-001
LAB-ONE watch engine
first hybrid caliber AK Watch Maker, only available in LAB-ONE
LAB-ONE Steel 904L

Steel, the raw material of watches

Steel is the traditional material for watches. The cogs of the watch calibers are made of steel but so are the majority of watch cases. Heavier than titanium, the material is also distinguished by its more luminous and shiny gray. It is an elegant and classic material.

It's perfect for those who like to feel the weight of the watch on their wrist. The steel we use in our watches is one of the most durable among stainless steel. It is a solid companion that will accompany you far in your travels and adventures.


Because it is as important to you as it is to us, all of our timepieces are produced with the greatest care, following the Swiss watchmaking tradition, a symbol of quality, safety, authenticity, and reliability.

Steel 904L
Classic, timeless and brilliant
Rubber Crown and Pusher
Better grip and more comfortable
Reliable and durable

Midnight blue bracelet

The basic bracelet supplied is only one piece and without a clasp for maximum comfort. It is a fusion of metallic fibers and Nomex hypoallergenic light material. It slips on like a rubber band and uses shape memory. Even if it is twisted, the bracelet does not deform.


Per our sales policy, all sales are final, with no possible returns.


Frequently Asked Questions

The watch box is the charging system.

Your watch needs to be charged for a few hours every week. The best way to keep it running every day is to let your watch charge while you sleep. Simply plug in the transmitter and place your watch within 40 cm of it. Your watch will automatically take the energy needed to fill its tank. ;-)

Yes, just because it contains electrical components doesn't mean you can't take it for a quick swim. The waterproofness of LAB-ONE is 100m / 10Atm.

You will receive a Nomex™ strap with the watch. No leather strap for LAB-ONE. Nomex™ is an ultra-resistant fabric, used for example for firefighters' uniforms or astronauts' suits. This bracelet uses shape memory and is therefore suitable for all wrists, including yours.

Because making a good product by hand often takes time.

AK is a small business that is limited by its scale. For the sake of efficiency, we operate with limited stocks and because our watches are handcrafted, they are manufactured on demand.

Payment happens when the order is complete and the watch will be shipped as soon as the assembly is complete. You will be kept informed throughout the production phase. (For example, watches ordered at the end of 2022 will be shipped by the summer of 2023). Be careful, the longer you wait to order, the longer you will have to wait.

That we are here for you.

It's true that we don't have a shop at the moment where you can try our products out, but we regularly organize meetings with our future customers to reassure them.

Want to chat with our team? Join us on our social media accounts or you can click on the contact button on the website.

We offer a two-year guarantee. But we will still be there for you after that.

LAB-ONE Steel 904L

Technical Description


9 o'clock - 3 o'clock 42 mm x 6 o'clock - 12 o'clock 37.8
Height 9 o'clock 5 mm / 3 o'clock 10 mm
Water resistance
100m / 10Atm
Double-sided, anti-reflective
Steel / Rubber
Diameter 10 mm
Satin-finished, electro-luminescent hands

anodysed blue titanium grade 5 inner bezel
One-piece strap without clasp
Shape memory
Titanium Textile Nomex ™ Universal size

first hybrid caliber AK Genève, only available in LAB-ONE


6 o'clock-9 o'clock: 36.7 mm
6 o'clock-12 o'clock: 33.7 mm 
Height: 6.9 mm and with super cap: 8.75 mm 
Grade 5 Titanium
Grade 5 Titanium
Grade 5 titanium
Optical sensors
Low-power laser and optical dynamometric sensor
Accelerometer / Gyroscope
Manual and automatic winding
Index assembly
Driven by a linear motor
28,800 Alt / h 4HZ Power
Power reserve indicator
Power supply
Rechargeable battery 3.8v / 125mAh
Low consumption Bluetooth


Free Delivery
2 Years Warranty
locked and key
Secure Payment
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