Formex Made a Compact Forged Carbon Diver and It's Everything Big Brands Won't Build

The Watch That Shouldn't Exist

Forged carbon dive watches are usually huge. Big case, big lugs, big presence. The material itself is exotic, expensive, and technically demanding — which means brands that work with it tend to put it on flagship pieces designed to make a statement.

Formex just released the Reef 39.5 Forged Carbon. A 39.5mm, COSC-certified, 300-meter dive watch with a forged carbon case. That combination — small, certified, deep-rated, and exotic — basically doesn't exist anywhere else.

This is the kind of watch that only happens when a brand actually listens to what people are asking for instead of telling them what they should want.

What Formex Actually Does

Formex was founded in Biel/Bienne in the late 1990s and revitalized in 2016 under Raphaël Granito. The brand's calling card is engineering — patented case suspension systems, real-world ergonomics, and modular design. They were doing technical, motorsport-influenced watches before that became a trend.

The Reef collection is their dive watch line. It's quietly become one of the most legitimate dive watch options in the independent space — COSC-certified across the line, well-made, distinctively designed, and priced way under what comparable Swiss brands charge.

What Makes Forged Carbon Different

Forged carbon is exactly what it sounds like — carbon fiber strands compressed and formed into a solid material under heat and pressure. It's lighter than aluminum, harder than steel, and visually unique. Every case has a different pattern, like a fingerprint, because the carbon strands settle differently each time.

The downside is it's hard to machine, expensive to source, and easy to crack if you don't know what you're doing. Most brands that work with it are either ultra-high-end (Audemars Piguet, Richard Mille) or ultra-marketing (lots of microbrands that use cheap composite and call it 'forged carbon').

Formex is doing it the right way. Real material, real engineering, sensible pricing.

The COSC Detail

COSC stands for Contrôle Officiel Suisse des Chronomètres, the independent Swiss organization that certifies movement accuracy. Watches that pass get the right to be called 'chronometers.' Most watches in the Reef's price range don't bother with COSC certification because it costs money and time. Formex certifies the entire Reef line. That's a meaningful commitment.

Why 39.5mm Matters

Dive watches got too big at some point. The Submariner is 41mm. Most modern dive watches are 42-44mm. Forged carbon dive watches are usually pushing 45mm or more.

39.5mm is the sweet spot. It wears like a vintage dive watch but it's modern enough not to feel small. It works on smaller wrists, it works on larger wrists, and it doesn't shout for attention. For a dive watch — which is supposed to be a tool, not a statement — that's exactly the right scale.

The CS Take

The Reef 39.5 Forged Carbon is everything the big Swiss brands won't make. Compact, technically serious, materially exotic, and priced like the brand actually wants you to own one. It's the watch you buy when you've outgrown the obvious choices but you don't want to play the Richard Mille game.

Formex isn't trying to be a luxury brand. They're trying to be a great watch brand. And for the people who can tell the difference, that's exactly what makes them worth paying attention to.