WRB Full Lume Black Watch Ralf Tech x Ocarat - Limited Edition

An Ocarat exclusive, limited edition of 50 numbered pieces.

The Watch

Ralf Tech is a French watchmaking brand founded in 1996 by professional diver Frank Huyghe. Built for diving enthusiasts and underwater adventurers alike, it crafts authentic, durable, and precise dive watches that stand out for their versatility and innovative engineering. Through its WRB collection, Ralf Tech delivers models that are as technically accomplished as they are beautifully refined. Discover the stunning WRB Full Lume Black Ralf Tech x Ocarat watch - an exclusive you won't find anywhere else. Born from a collaboration between Ocarat and Ralf Tech, it is offered exclusively as a limited edition of 50 numbered pieces, crafted for our most discerning customers. It's the kind of watch that makes a statement in every setting - from daily wear to extreme adventures - wrapping your wrist in effortless style at any hour of the day or night. Designed to elevate men's wrists with sophisticated flair, it houses a barrel-shaped case measuring 39 mm in diameter, crafted from 316L surgical steel. Finished with a satin brushing and a PVD coating for its striking black color, it sits beautifully on the wrist with all-day comfort. A knurled, screw-down crown at 4 o'clock lets you wind the hands at any time. A domed sapphire crystal protects the dial from daily shocks and scratches, measuring 2.50 mm thick with an anti-reflective coating for comfortable viewing from every angle. It is encircled by a unidirectional knurled bezel with 120 clicks featuring an anodized black aluminum insert marked with white minute graduations and a SuperLuminova C5 triangle marker at 12 o'clock - perfect for tracking elapsed time during any activity. The screw-down, engraved caseback ensures water resistance to 20 ATM. The watch ships in an Explorer Suitcase presentation box crafted from polycarbonate.

The Dial

A stunning full lume round dial sits at the heart of the case, bringing a breath of fresh air with its cream color and semi-matte finish. Easy to read in any lighting, it delivers optimal nighttime legibility thanks to its SuperLuminova C3-treated background, which glows green in the dark for an even more captivating effect. At the center, a slim silver seconds hand sweeps steadily through its circuit. It is accompanied by two grey baton hands for hours and minutes, adorned with a black center stripe and coated with Super Luminova C5 for excellent visibility after dark. They track a minute track marked by black lines around the periphery, signed "Made in France", and home to twelve black hour markers for quick time reference. 3, 6, 9, and 12 o'clock are marked with Arabic numerals while the remaining hours are represented by batons. Finally, the brand name and logo appear below 12 o'clock as a signature, while water resistance and movement type are noted at 6 o'clock.

The Movement

The in-house RTA003 caliber brings this watch to life, ensuring flawless performance and silky-smooth hand movement. Celebrated for its quality, efficiency, and reliability, this automatic movement is based on the Seiko NH35/NH36 and oscillates at 21,600 vibrations per hour, or 3 Hz. It delivers precise, dependable readings of hours, minutes, and seconds in all conditions, powered by 24 jewels and a 40-hour power reserve.

The Strap

For this exclusive edition, you'll find a refined Tropic strap - timeless, comfortable, and built to last. Its perforations, flexibility, and durability make it an ideal everyday companion. Crafted from black silicone with a rich, deep black hue, its clean construction and carbon-effect textured design make it as stylish as it is functional. It hugs your wrist with a sport-chic elegance that works with any look. The 316L surgical steel pin buckle, measuring 20 mm wide, makes for easy, secure wear.

An extra Zulu strap comes included with this watch, letting you switch up your look on a whim and embrace a bolder, sportier style. Built for everyday adventures, it delivers all-day comfort and ease of wear. Crafted from black nylon in a single-piece construction for a striking wrist presence, its refined design and versatile style pair effortlessly with any outfit, adding a timeless touch of elegance. The pin buckle, made from 316L surgical steel and measuring 20 mm wide, ensures easy, secure fastening.

Note that the lug width of these straps is 22 mm.

Water Resistance

With water resistance to 20 atmospheres, or 200 meters, this model earns the title of true dive watch without hesitation. Ocarat's watch experts agree: it's more than capable of handling showers, baths, lap swimming, freediving, and recreational scuba. However, it is not designed for extreme deep-sea diving where crushing pressure would overwhelm its seals. For professional divers tackling serious depths, we recommend models rated 30 ATM and above. We also advise against operating the pushers or crown while submerged, to preserve perfect water resistance at all times.