The Fleux FLX004 Skin Diver

by Brent Robillard

A masterclass in restraint

When it comes to watch design, less is often more. Fleux Watches has built its reputation on that very philosophy, and with the FLX004, the brand delivers a fitting final chapter to its Skin Diver series. At The Calibrated Wrist, we have been transfixed by the evolution of this collection since the simultaneous launch of the FLX001/FLX002, and last year’s late addition of the FLX003 (a personal favourite). This newest release is a deliberate study in balance, proportion, and function, embracing the purity of classic tool watches while injecting a modern sensibility.

Fleux FLX004 Watch Review — ^{Fleux FLX004 Skin Diver @calibre321}

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Key Features of the Fleux FLX004

A Sector Dial That Speaks to Heritage

At the heart of the FLX004 is its sector dial—a nod to vintage navigational instruments and military timepieces. The design isn’t just aesthetically pleasing; it prioritizes clarity and symmetry, ensuring that time-telling remains as intuitive as it is striking. The choice of a glossy black dial with gilt accents adds an understated elegance, making the watch equally at home in casual and formal settings.

Timeless Broad Arrow Hands

Fleux’s decision to equip the FLX004 with broad arrow hands (a shared element with the FLX003) reinforces its commitment to function-first design. Inspired by classic MOD specifications, these hands offer maximum legibility, enhanced further by Super-LumiNova C3 “Old Radium” lume. The choice of C3 lume over BGW9 is a thoughtful one—green light remains the most visible to the human eye in darkness, ensuring real-world practicality without excessive brightness.

Case & Comfort: A Daily Companion

The FLX004’s 38mm case diameter and 47mm lug-to-lug measurement hit the sweet spot for both modern and vintage-inspired tastes. The 316L stainless steel case is predominantly brushed, with polished chamfers that subtly catch the light. At 12mm thick (14mm including the top of the crystal), the watch maintains a balanced wrist presence without feeling bulky. The screw-down crown and 200m water resistance make this a true everyday companion, ready for both land and sea.

A No-Nonsense Bezel & Movement

In keeping with its refined, tool-watch ethos, the FLX004 features a bi-directional friction bezel with a sterile aluminum insert. This choice, while unconventional in a market filled with dive-time bezels, reinforces the watch’s identity as a purebred skin diver—a timepiece built for the everyday adventurer rather than deep-sea saturation divers. The bezel action, itself, is smooth and satisfying.

Powering the FLX004 is the reliable Seiko NH38A movement, a no-date automatic caliber with a 41-hour power reserve. It’s a workhorse movement that ensures longevity and ease of maintenance.

Sustainability Meets Style: The SEAQUAL Strap

Fleux takes an eco-conscious approach by pairing the FLX004 with a SEAQUAL strap made from recycled ocean plastic. Beyond its sustainability credentials, the strap is lightweight, durable, and adapts naturally to the wrist over time, providing exceptional comfort without compromising on style.

SPECS

Case	316L Stainless Steel 38mm Diameter 47mm Lug to Lug 14mm Thick 20mm Lug Width Bidirectional Friction Bezel Screw Down Crown & Case Back 200m Water Resistance
Dial & Crystal	Domed Hesalite Crystal Glossy Black Sector Dial Broad Arrow Handset C3 “Old Radium” Super-LumiNova
Movement	Seiko NH38A 24 Jewels 21 600bph 41-Hour Power Reserve
Strap	SEAQUAL Strap

Fleux FLX004

Final Thoughts

The FLX004 embodies Fleux’s ethos: timeless design, meticulous execution, and an appreciation for details over excess. In a world saturated with flashy, trend-driven watches, this skin diver stands out for its restraint. It doesn’t clamour for attention—but for those who notice, it speaks volumes.

For enthusiasts who value classic proportions, a thoughtful dial layout, and robust everyday wearability, the FLX004 is a compelling offering. As the final installment in Fleux’s Skin Diver series, it cements the brand’s reputation for creating pieces that are as purposeful as they are stylish.

With its sophisticated yet understated appeal, the Fleux FLX004 is not just another dive watch—it’s a statement of refined taste and an appreciation for true watchmaking essentials.

Pricing & Availability

The Fleux FLX004 retails for $499USD and is available as of today. For more information, please visit the brand website.

About the author

Brent Robillard is a writer, educator, craftsman, and watch enthusiast. He is the author of four novels. You can follow him on Instagram.

Off The Cuff articles are full-length, hands-on reviews of the watch in question and represent the opinion of the author only. All photos are original, unless specified otherwise. If you would like to have your watch reviewed on this site, contact us here.