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Formex Reef

The Formex Reef is a 300m professional dive watch featuring interchangeable bezels and a COSC-certified SW300-1 caliber.

The Formex Reef is a technical marvel in the dive watch space. It features a unique bezel system that allows users to swap the ceramic bezel insert and ring tool-free, making it easy to change the watch’s aesthetic.

Overview

Brand: Formex
Model: Reef
Collection: Reef
Price: £1,650–£1,950 GBP
Website: formexwatch.com

Specifications

Case Diameter: 42.0mm
Thickness: 11.4mm
Lug to Lug: 47.0mm
Lug Width: 22.0mm
Water Resistance: 300m
Case Material: 316L Stainless Steel
Crystal: Sapphire
Strap/Bracelet: Stainless Steel Bracelet / Rubber

Design & Wearability

The Reef sits exceptionally low at 11.4mm. The case features asymmetrical extensions that act as crown guards on the right and balance the design on the left, completed by a quick-adjust bracelet clasp.

Movement & Performance

Driven by the premium Swiss Sellita SW300-1 automatic chronometer movement. Only 3.6mm thick, this movement allows the case to remain thin while delivering COSC accuracy and a 42-hour power reserve.

Official Website

Formex Reef product page

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Tags: , , , , , Last modified: 26 May 2026
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