How To Easily Change The Bezel On Your Formex Watch - Formex Reef or Formex Reef GMT

WU_STAR_WHITE_600.png__PID:7f4a82c7-c5f0-4e8c-87f6-64fb0fc0e355

Windup Watch Shop

Aug 8, 2025

In this video, we walk you through how to change the bezel out on a Formex Reef watch. Whether you are looking to update the look on your Reef GMT, your Reef Diver, or Baby Reef 39.5mm, it can be a bit tricky to figure out how to get your bezel off to put the new one on. Hopefully, this video helps and allows you to have more fun with your watch without spending money on an entirely new piece. Let us know down in the comment section what other watch questions we can cover in future videos!

We will be creating more content like this in the future, so be sure to follow along on our Windup Watch Shop YouTube channel for more!

A professional diver with a bezel you can change

The Formex REEF 39.5mm brings professional dive watch specs to a refined, compact platform. Sized down from its 42mm sibling, this version delivers 300 meters of water resistance, a screw-down crown, ceramic bezel, and box-shaped sapphire crystal — all in an 11mm-thick case that wears comfortably at 45.5mm lug-to-lug.

Formex refines their original field design

The Formex Field Automatic Gen 2 is the natural evolution of a field watch built for life in motion. Housed in a lightweight, ultra-hardened titanium case and powered by a Swiss automatic movement, the Field Gen 2 pushes the boundaries of where a field watch can go — and how it should feel.

Formex's take on an everyday watch

The Formex Essence ThirtyNine distills the technical innovation and refined aesthetics of the original Essence into a more compact 39mm case — offering COSC-certified accuracy, crisp finishing, and daily versatility in a slim, lightweight package.Its horizontally brushed dial features CNC-machined grooves, applied indices, and a beveled date window at 6 o’clock. The stainless steel case blends brushed surfaces with polished accents and integrates Formex’s patented suspension system, providing both comfort and shock resistance. A box-shaped sapphire crystal with anti-reflective coating ensures clarity from every angle, while the exhibition caseback reveals the decorated Swiss movement within.

Three bold new dials

The 40mm Grade 2 titanium case undergoes a proprietary hardening process, boosting surface hardness from 145 HV to 900 HV — nearly three times harder than Grade 5 titanium — all while keeping the signature matte texture and ergonomic feel. The nylon/Velcro strap system, now available in black, blue, and khaki, ensures a lightweight fit and effortless all-day wear, complete with tool-free interchangeability.

REEF 39.5mm Automatic Chronometer 300M

The dial is clean and highly legible, with applied indices, a 6 o’clock date window, and generous Super-LumiNova for low-light readability. Offered in bahama blue, blue, white, or silver, with a 120-click ceramic bezel that rotates with smooth, precise feedback. Every model comes fitted on Formex’s stainless steel bracelet, which includes their patented on-the-fly micro-adjust clasp for quick, tool-free sizing. That quick change feature also extends to the bezel, which can be swapped in seconds — allowing for easy customization without compromise.