Ralf Tech
WRB Black First Edition Automatic - Full-Set

“In the darkness of depth, the watch is no longer a simple object. It becomes an essential reference, a lifeline.”

The RALF TECH WRB 1101 Black First Edition is a limited series launched in 2025, conceived as the purest expression of the WRB in its original version. With its 39 mm steel case, black dial with highly luminous beige indexes, its RTA 003 automatic movement and its true technical diving watch DNA, it stands as a piece of use, compact, legible and coherent. This example is offered full set, in near-new condition. There is in this WRB 1101 something deeply rooted in reality. A watch that does not seek to seduce by its appearance, but by what it is capable of doing. The black dial, dense, absorbs the light, while the beige indexes filled with luminescent material emerge with immediate readability. In the water, in low light, in effort, reading becomes instinctive. It requires no effort.

Wearing a RALF TECH means very quickly understanding that the object has been designed to face extreme conditions. Not in an office, but in use. In the cold, in pressure, in environments where every detail matters. This WRB does not deviate from this logic. It is compact, direct, functional. It slips onto the wrist, disappears, then comes back at the precise moment when it becomes indispensable. One can easily imagine this watch on the wrist of a professional diver. Not in a shallow dive, but in a long, committed descent… Gas mixes, decompression stops, depth, concentration. In these conditions, time is not checked. It is controlled. And the watch becomes a safety tool. But what makes this WRB singular is its ability to step out of this universe. Once back at the surface, it does not change its nature. It continues to accompany. Sport, movement, daily life. It always remains by your side to support you.

The WRB line marks an important step in the evolution of RALF TECH. After the WRX, more massive, designed for extreme use, the WRB introduces a more compact, more mobile dimension, without ever denying its professional DNA. Introduced in the 2020s, the WRB is aimed at those who are looking for a true diving watch, but wearable daily. It retains the essential codes: robustness, water resistance, legibility, while reducing the diameter to offer rare versatility. The Black First Edition, produced in 2025 as a limited series, stands as one of the most coherent versions of this line. It returns to a refined, almost original reading of the diving watch. At the heart of this WRB 1101 beats the RTA 003 calibre, an automatic movement developed for RALF TECH. It operates at 21,600 vibrations per hour, a frequency deliberately chosen to favor robustness and stability in demanding conditions. It is equipped with 25 jewels, ensuring reduced friction and long-term durability. The power reserve is approximately 40 hours after full winding, ensuring autonomy suited to active daily use. This movement prioritizes reliability, consistency, and ease of maintenance. A mechanism designed to last, without compromise.

An architecture designed for technical diving: The 39 mm steel case offers a rare balance between presence and wearability. It allows prolonged use without fatigue, even in demanding conditions. The unidirectional rotating bezel allows precise control of immersion time, an essential element in diving. The black dial and highly luminous beige indexes ensure optimal readability in the darkness of depth. The black rubber strap ensures support, comfort and resistance to salt water as well as perspiration. Each element is designed with a logic of safety, legibility and durability. This WRB is not limited to its initial use. It accompanies. It is intended for a sportsman, a technical watch enthusiast, someone who lives with their watch daily. It fears neither water, nor shocks, nor changes in pace. It does not seek to impress. It works and does the job, seriously, with strength and stability. It is a watch that one chooses for what it allows to do. And that one keeps for what it becomes on the wrist.

2025 example, offered full set with original box and papers. Watch in near-new condition, inspected, authenticated and prepared in workshop according to Mostra standards. Choosing this WRB at Mostra means entering a demanding approach to pre-owned watches. It means accessing one of the largest collections of pre-owned watches in the South of France, built with coherence and passion. It means benefiting from more than 40 years of watchmaking experience, from a perspective capable of identifying reliable and durable pieces.

Since 2025, Mostra is also the first certified RALF TECH center for pre-owned watches in the world, ensuring a level of service perfectly suited to these models. Each watch is inspected, authenticated and prepared, with rigor. This discipline is reflected in verified 5-star customer reviews and regular recognition by the professional press. And above all, each watch is guaranteed for 3 years, a strong commitment that anchors your purchase over time. Choosing Mostra means choosing a watch that is right, supported with rigor, carried by a house that deeply understands functional watchmaking.