Formex REEF

I’ve been wearing the REEF for almost a month now, so it’s time that I share my review with you. Knowing Formex, I was expecting nothing but the best. The watch didn’t just tick all the boxes, it even exceeded my expectations!

The specs

Swiss Made Sellita SW300-1 (self-winding) Automatic (Chronometer grade), officially certified by COSC. 25 jewels. Date display. Custom-built skeleton rotor with thermally blued screws. 42 hours power reserve.
Diameter: 42mm
Height: 11.4mm (perceived 9.4mm)
Lug width: 22mm
Lug-to-lug: 47mm
Water resistance: 30 bar (300 metres / 1000 feet)
Weight: 90g (case only)
Bezel: Unidirectional rotating Zirconium Oxide Ceramic bezel (blue, black, green) / Stainless steel for the steel bezel
Case: Stainless steel 316L
Glass: Sapphire crystal with anti-reflection treatment
Black rubber strap with curved spring bars, Quick Release function and carbon fiber composite deployant clasp with patented Micro-Adjustment System.
Stainless steel bracelet with screwed links, Quick Release function and stainless steel buckle with patented Micro-Adjustment System
Multi-finished & hand-applied Dégradé. BGW9 Super-LumiNova on hands and indexes.

The case

The distinctive shape of the REEF gives it a strong personality. It has sharp edges and alternates polished and brushed surfaces, playing beautifully with the light. The aggressive look of those edges is soften by the polished parts and the curves, resulting in a sporty yet classy design. Its 42mm case width should fit most wrists, especially considering the short lug-to-lug length of only 47mm. With a height of only 11.4mm, it’s really thin!

The signed crown is located at 3 o’clock, protected by large crown guards. The left side flank gives it a symmetrical and well balanced aspect, that I really like!

The unidirectional rotatable bezel is made of an extremely hard and scratch-resistant Zirconium oxide ceramic. The graduations and numbers are engraved by femto-laser pulsations, requiring 60 minutes of engraving for each bezel. I love the way it looks and plays with the light, going from a deep matte blue to something much lighter. It may not offer the best legibility from a diver point of view, but from a desk-diver perspective it’s really beautiful 🙂 That being said, even if the bezel isn’t fully covered with luminova, it still features a luminova pearl at 12 o’clock.

The dial

The sunray finished dial is probably what I like the most about the REEF. It was manufactured at Formex’s in-house dial manufacture in the Jura mountains, and shows a gradient blue that was hand-sprayed. It reacts beautifully to the light and gives the watch a fantastic wrist presence!

One can feel the inspiration of the Formex Essence on the design of the REEF’s dial! It has larger hands and markers though, and those were generously covered with BGW9 Super-LumiNova, offering a perfect legibility in any situation.
If you take a closer look at the hands or at the triangle-shaped indexes, you can see that the finish quality is exceptional. Formex delivered once again a level of craftsmanship rarely found at that price tag!

As usual with Formex, the AR coating of the sapphire lens is among the best !

The movement

The REEF is equipped with the Swiss Made Sellita SW300-1, Chronometer grade and COSC certified. This premium movement features a Glucydur balance wheel, which is very resistant and non-magnetic. It’s also very thin, another reason why it was chosen by Formex.
All movements were tested by the official Swiss Chronometer Testing Institute, and then further tested after the watch assembly to measure if there is any deviation from the certification rates.

The straps

Formex has always been bringing a lot of innovation to their watches. Although the REEF’s case doesn’t come with their patented suspension-system, their straps are once again the result of a fantastic design and engineering work! Both the rubber strap and the stainless steel bracelet are very comfortable. They’re also both equipped with a very innovative quick-release system, an efficient way to swap them in only a couple of seconds and make them look like they’re integrated to the case!

They both feature a tool-free fine-adjustment system, allowing you to adjust the strap length on the go whenever need be. This is absolutely fantastic!


After almost a month on the wrist, I must say that I have barely worn another watch since this one arrived. It matches everything I’m looking for, from a gorgeous design to a top-notch built quality! The REEF costs 1790€ on the bracelet. It’s not the most “affordable” piece we’ve reviewed here, but it’s definitely the best price/quality ratio one can find!
The REEF comes in 32 customizable variations, I strongly recommend you to read more on Formex’s website!

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