ABOUT THIS WATCH
The Reef 39.5 mm with its “Bahama Blue” dial is the ultimate summer divers’ watch with exchangeable ceramic bezels and a patented fine adjustment system for a perfect fit in heat and humidity! Our experts in the Swiss Jura mountains achieve the dial's deep, lustrous shine by applying colored lacquer on a mirror-polished surface, followed by seven coats of transparent lacquer, which are then polished down. This is evident in the 6 o’clock date window, a hallmark of all Formex watches. Completing the summer look, the color-matched ceramic bezel is polished with diamond paste, with numerals and hour markers hand-filled with black resin for optimal legibility. The 120-click unidirectional bezel can be removed and swapped by hand with one of four existing options from the Reef 39.5 mm collection. The “Bahama Blue” is powered by a COSC-certified Sellita SW300-1 with 56 hours of power reserve. Our unique gradual fine-adjustment systems in all strap and bracelet options noticeably enhance wearing comfort on the wrist throughout the day, especially during the summer months.
Read More
FEATURES
An Automatic, also called self-winding watch, is a mechanical watch in which the mainspring is wound automatically as a result of the natural motion of the wearer's arm, to provide energy to run the watch, making manual winding unnecessary. All our Automatic movements are manufactured in Switzerland.
Found in diving watches, the unidirectional rotating bezel is a unique feature that helps measure diving time in a handy and effective manner. The bezel can only rotate in a counter-clockwise direction, which ensures diver's safety even in the case of any accidental manipulation underwater.
A screw-down crown is a threaded winding crown that screws tightly into the case and prevents water and dust from entering. Screw-down crowns are commonly used in Diver’s watches, as they prevent from accidentally pushing open the crown, causing possible water damage.
A sapphire crystal or “glass” is a very hard, transparent material made of crystallizing pure aluminium oxide at extremely high temperatures. Sapphire is one of the hardest substances on earth. It measures 9 on the Mohs scale (diamond measures 10, the highest rating), which is a system for rating the relative hardness of various materials, making it virtually scratch proof.
Applying AR coating will limit the reflection on a sapphire or mineral glass to a very low level.
A chronometer is a watch that has been tested and certified to meet the most strict precision and accuracy standards. “Chronometer” isn’t just a name that any watch brand can print on the dial of its watches. It is an official nomenclature, defined by precise rules, which lay down the definition of the term “chronometer”, describing the categories, the test programme and the acceptable minimum requirements for wrist chronometers. In Switzerland, the COSC, or Contrôle Officiel Suisse des Chronomètres, is the only official organisation allowed to certify chronometers.
Water resistance measures how much water pressure a watch can handle before it breaks. This measurement is important to know for the proper care and keeping of your watch. Water resistance of 300 m / 1000 ft means that it can be used for swimming, snorkeling and diving.
This watch features an ultra-strong and light-weight folding clasp, made of carbon fiber composite and a stainless steel or titanium buckle. The gradual fine adjustment system allows you to tighten or loosen the strap length when the wrist size varies due to temperature and activity.
All straps and bracelets can be interchanged by hand without the use of any tools and in a few mere seconds. This allows you to easily swap straps on the go and wear your personal style for any occasion.


Unidirectional rotatable Ceramic bezel
Being one of the most exposed parts, the unidirectional rotatable bezel is made of an extremely hard and scratch-resistant Zirconium oxide ceramic. The color-matched "Bahama Blue" bezel is polished with diamond paste and the numerals and hour markers are hand-filled with black resin for optimal legibility. Machined gear-like indentations on the bezel’s edge allow a diver the ideal grip to safely set and monitor diving time and decompression stops. The 120 click action is responsive and smooth, yet offers firm and precise function of the bezel. Besides that, the bezel can be changed without the use of any tools and switched with one of the existing four bezel options of the Reef 39.5mm collection..

officially certified movement
The Reef 39.5mm is powered by a Swiss Made Sellita SW300-1 self-winding movement with a power reserve of 56 hours. We've chosen its highest quality grade "Chronometer" because it comes with premium components such as a Glucydur balance wheel which is exceptionally hard and stable, very resistant to deformation, non-magnetic, and non-corrosive. Another reason why we've purposely chosen this thin movement is because it allowed to construct the Reef at just 11.0mm overall height. The movement is completely decorated and wound by Formex’s in-house developed and custom built skeletonized rotor. Each one of these movements is certified by the COSC (the official Swiss Chronometer Testing Institute) and undergoes the meticulous 15-day rate test to ensure extraordinary levels of mechanical accuracy and precision. Each certified chronometer is unique, identified by a number engraved on its movement and a certificate number issued by the COSC. While less than 3% of Swiss watch movements are officially certified, Formex further rate test them per the same criteria after assembly, to measure if there is any deviation from the certification rates.
fine adjustment clasp
Besides contributing to visual appeal, the details on the REEF also serve a purpose. For a timepiece to be a watch for all occasions, it needs to feel exceptionally comfortable on the wrist. For even more wrist comfort, Formex added their patented Carbon Fiber Composite Folding Clasp that allows for fine-adjustment of the strap length on the go, allowing for a perfect fit on the wrist in all conditions and temperatures. The strap can be changed without the use of any tools with Formex's patented quick release system. The stainless steel bracelet with screwed links has the same quick release system and also features a unique fine-adjustment system.

A LACQUERED AND POLISHED DIAL
Experts at our own dial manufacture in the Swiss Jura mountains apply a colored lacquer on a mirror-polished surface followed by the layering of seven coats of transparent lacquer. These are subsequently polished down to achieve a uniquely deep lustrous shine, particularly evident in the angled date window at 6 o'clock (with its color matched date wheel) – a hallmark of all Formex watches. To further create visual depth without increasing overall height (a mere 11mm!), the gun-metal finished and hand-applied indices are triangle-shaped and angled towards the center to imitate a chapter ring. To increase legibility, the indices as well as the broad hour and minute hands are vertically brushed, while the bevels are mirror polished. Hands and hour markers are deep filled with Swiss Super-LumiNova® BGW9 that emits a long-lasting blue glow in dark conditions.
TECHNICAL SPECIFICATION
FINE-ADJUSTMENT DEPLOYANT CARBON CLASP
Your rubber strap comes on our new deployant clasp with a patented fine-adjustment. More intuitive to operate, the new version is fully made out of our proprietary carbon fiber composite. The micro-adjustment is now even easier to use and can be operated while the watch is on your wrist. Lightweight, smooth to the touch, ultra-durable and highly functional, this clasp is a real piece of engineering, making your REEF even more comfortable to wear.
















