WRB Blue Dial - Diving and nautic sports

The WRB, initially designed for French Army divers between October 2019 and June 2020, quickly won over watch enthusiasts. First released in two public versions, its rapid success led the brand to unveil a new summer collection featuring six different variations. Staying true to its original dimensions, the WRB features a 39 mm case in 316L surgical steel with either a satin finish or matte black PVD coating, depending on the model. It houses a Japanese-made automatic RTA003® movement, renowned for its reliability, with 24 jewels, a frequency of 21,600 vibrations per hour (3Hz), and a power reserve of up to 44 hours.

Designed for underwater exploration and nautical activities, the pre-owned WRB 39 offered by Mostra Aix-en-Provence is an exceptional timepiece — both robust and elegant — built to meet the needs of watch lovers and technical piece enthusiasts alike. It is powered by the RTA003 automatic mechanical movement, known for its reliability and precision. This Japanese movement features 24 jewels, operates at a frequency of 21,600 vph (3Hz), and delivers a power reserve of up to 44 hours, ensuring optimal performance over time.

With a true water resistance of 200 meters (660 feet), the WRB 39 exceeds the ISO 6425 standard for dive watches, guaranteeing exceptional durability under extreme conditions. Its 39 mm case, crafted from 316L surgical steel, comes in either a satin finish or matte black PVD, giving the watch a distinctive character and outstanding toughness. The sky-blue dial is enhanced by SuperLuminova® BGW9-treated indexes, ensuring excellent readability even in low-light conditions. The hands, made from satin-finished 316L steel, are also coated with SuperLuminova® Vintage BGW9, guaranteeing optimal visibility of hours, minutes, and seconds in all environments.

The domed sapphire crystal, 2.5 mm thick, is treated with anti-reflective coating, making it highly resistant to scratches and impacts while ensuring perfect dial clarity. The steel bezel, unidirectional with 120 clicks, features a black anodized aluminum insert, allowing precise timing for dives. The screw-down crown with protective guards and the engraved screw-down case back — each individually numbered — enhance both the water resistance and authenticity of the watch.

For comfort and style, the WRB 39 is fitted with a rubber strap suitable for all kinds of situations. It comes with a black silicone “Tropic” strap, ideal for aquatic environments. With a 22 mm lug width and 20 mm tang buckle, the watch ensures a perfect and secure fit on the wrist.

To ensure optimal protection during transport or storage, the WRB 39 is delivered in a waterproof and shock-resistant Explorer case, NATO-certified. This packaging reinforces its positioning as an exceptional timepiece, coveted by both horology enthusiasts and collectors seeking rare and technical models.

Following the aesthetic evolution initiated by the brand, this new WRB edition comes in refined and deep tones — notably sky blue — bringing timeless elegance and unique charm. For additional customization, a selection of leather straps is now available to order, alongside the black silicone options. Each finish is limited to just 100 pieces, produced in France in the Morteau workshops, underscoring the exclusivity and artisanal craftsmanship of the brand.

Ralf Tech, founded with a strong focus on the military and underwater exploration world, has distinguished itself through durable, reliable watches built for extreme environments. The brand has earned a solid reputation by equipping elite units and developing iconic models suited for both professionals and discerning collectors. Its growing popularity in the pre-owned market is undeniable, largely due to its positioning in the accessible luxury segment. Mostra Aix-en-Provence — a benchmark in exceptional and pre-owned watches — regularly offers Ralf Tech timepieces formerly used in military and professional contexts. This approach has enhanced the perceived value of Ralf Tech models, appealing to both enthusiasts and investors looking for rare and timeless watches.