ZRC MN64 Titanium World Record: a diving watch born at -145 meters
In the world of dive watches, the performance figures listed on a spec sheet are sometimes far removed from the conditions the watch will actually face. With the ZRC MN64 Titanium World Record, the story is different. This French diver's watch originates from a genuine feat accomplished in a natural environment: a freedive to -145 meters, achieved by Stéphane Tourreau. On June 26, 2026, in Sharm El Sheikh, Egypt, the French freediver and ZRC ambassador set a new CMAS world record in the variable weight category. ZRC chose to celebrate this achievement with a special edition of its Grands Fonds 3000, limited to just 50 pieces. But to reduce this watch to a mere commemorative edition would be a mistake. Behind its blue dial and titanium case lies a true instrument diver's watch: water-resistant to 3,000 meters, tested to 5,100 meters, equipped with a monobloc case in grade 5 titanium, and incorporating several technologies developed by ZRC for diving. It is available from €4,575.
Stéphane Tourreau: -145 meters with variable weight
The story of this ZRC (Zero Reconnaissance Club) begins beneath the surface of the Red Sea. A brand ambassador since 2015, Stéphane Tourreau is one of France's leading freedivers. On June 26, 2026, he reached a depth of 145 meters using variable weight, setting a new CMAS world record in this discipline. Variable weight diving is a particularly spectacular discipline. The freediver uses a weighted device to descend before ascending under their own power, notably with the aid of a rope or by finning, according to the applicable regulations. At such depths, performance is obviously not simply about holding one's breath. Pressure, equalization, physical and mental preparation, technical mastery, and ascent management make each attempt an extremely demanding exercise. The MN64 Titanium World Record is directly associated with this adventure. During the months of preparation for the record attempt, Stéphane Tourreau notably used the watch at depths exceeding 120 meters.
ZRC and diving: a much longer history
This association with contemporary freediving takes on a special dimension when one considers ZRC's history. The brand has a long-standing relationship with professional and military diving. Its famous Grands Fonds model is particularly associated with the French Navy, which adopted a version of the watch in the 1960s. It is from this history that one of the most recognizable visual characteristics of ZRC watches originates: the crown positioned at 6 o'clock. This unusual design was the result of careful functional consideration. The crown had to be protected while preventing it from hindering wrist movements or snagging on equipment. More than half a century later, this placement has become a true aesthetic signature of ZRC. The MN64 Titanium World Record thus maintains a clear connection to the brand's historical dive watches while utilizing radically contemporary technologies and materials.
A monobloc case in grade 5 titanium
For this edition, ZRC uses a 41.5 mm diameter monobloc case in grade 5 titanium. The choice of titanium is particularly fitting for a watch designed for extreme diving. It allows for an excellent ratio of mechanical strength to weight, contributing to the comfort of a watch designed to be worn like a true instrument. ZRC also specifies that the material is non-magnetic according to ISO 764 at 4,800 A/m. The monobloc construction is integral to the watch's overall design philosophy. The case back and crown are screw-down, and the entire assembly is designed to withstand pressures far exceeding those encountered during typical use.
3,000 meters of water resistance and tests down to 5,100 meters
The technical specifications here are quite impressive. The ZRC MN64 Titanium World Record is guaranteed water-resistant to 3,000 meters. But ZRC goes even further: the watch is advertised as having been tested at a pressure corresponding to a depth of 5,100 meters. Obviously, no scuba diver, let alone a freediver, will ever approach such depths. The purpose of such a construction is therefore not to allow a human being to dive to 3,000 meters with the watch on their wrist. This technical extravagance is rather a demonstration of the case's ability to withstand considerable pressures with a significant safety margin. This is an approach commonly found in extreme professional dive watches: pushing the theoretical resistance of the instrument to its limits so that the stresses of an actual dive fall well within its operating range.
A case back capable of deforming intentionally
Among ZRC's most original technical solutions is its case back with programmed deformation. The idea may seem paradoxical. One might think that the best dive watch is necessarily one whose case remains perfectly rigid when pressure increases. ZRC takes a different approach by working on how certain elements of the case react to stress. Deformation is no longer simply endured: it is anticipated and integrated into the design. This technology is one of the defining characteristics of contemporary deep-water watches and contributes to their ability to achieve exceptionally high levels of water resistance. The MN64 Titanium World Record naturally benefits from this feature.
A crown always positioned at 6 O'Clock
It's impossible to discuss a ZRC deep-water watch without mentioning its crown. On this MN64, it remains positioned at 6 o'clock and benefits from the Crown Protection System – CPS™. It is screw-down, has double water resistance, and uses a reverse thread. Beyond its aesthetic originality, this positioning strongly contributes to the watch's identity. When worn, no crown rests against the back of the hand. The design also naturally protects this particularly sensitive element on a watch intended for use in demanding environments. It's a perfect example of a technical solution that has become, over time, a visual signature.
ECS: A bezel designed for easy cleaning
The bezel is obviously an essential element of a dive watch. The MN64's bezel is unidirectional, notched, and divided into 60 graduations. It features a ceramic insert. But ZRC adds its ECS – Easy Clean System, a patented technology that makes cleaning the area beneath the bezel much easier. For a watch actually used at sea, this detail is far from insignificant. Salt, sand, and various particles can gradually accumulate between the bezel and the case. ZRC's approach once again illustrates the philosophy of the true tool watch: considering not only the watch's performance when new, but also the stresses it will encounter during use.
LUMICAST: indexes constructed with luminous material
At great depths, light gradually disappears, making legibility a fundamental characteristic. ZRC employs a technology called LUMICAST here. The indexes don't simply receive a small amount of luminescent material deposited on their surface. They are 3D printed using SLN-X1 luminous material, creating raised elements containing a significant amount of luminescent substance. The result also gives the dial considerable depth. On this World Record edition, the dial features a particularly striking gradient Caribbean blue. The color gradually darkens, naturally evoking the disappearance of light as one descends below the surface. On a watch celebrating a dive to -145 meters, it's hard to imagine a more fitting choice.
A 5 mm sapphire crystal
The dial is protected by an imposing 5 mm thick domed sapphire crystal with an anti-reflective coating. This feature demonstrates how the MN64's construction differs from a traditional diver's watch. The crystal must contribute to the overall strength of the case when subjected to considerable pressure. Its domed profile also evokes certain historical dive watches, even though the material and performance clearly belong to contemporary watchmaking. Finally, the use of sapphire provides exceptional scratch resistance, particularly valuable for a watch designed to be regularly exposed to harsh environments.
ZRC MN64 Titanium World Record: when the tool watch returns to the field
Ultimately, this is what makes the ZRC so interesting. Contemporary watchmaking makes extensive use of the vocabulary of exploration, the military, and diving. Yet, many of the watches presented in this way will likely never encounter the environments to which their aesthetics refer. The ZRC MN64 Titanium World Record takes a different approach. Its story is directly linked to a freediver who pushed the limits of his discipline to 145 meters below the surface. Its grade 5 titanium construction, 3,000-meter water resistance, pre-curved case back, protected crown at 6 o'clock, ECS bezel, and LUMICAST markers all contribute to this pursuit of performance. Of course, very few owners will exploit even a fraction of its capabilities. But ultimately, that's not the most important thing. From early military watches to high-performance professional dive watches, the tool watch has always been fascinating precisely because it is built to go far beyond the ordinary needs of the wearer. With this limited edition of 50 pieces, ZRC is therefore not simply celebrating a record. The brand is also reminding us of what has always made a true dive watch so appealing: being conceived as an instrument before becoming a collector's item.
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Editor: Éric Barse
Journalist, entrepreneur, and founder of the websites www.cafe-racer-only.com and www.scooter-3-roues.com, Eric Barse divides his time between his passions: motorcycles, travel, and watches. A graduate of the Saint-Cyr military academy and the 2nd RPIMA (Parachute Regiment) before pursuing a career in communications and digital media, he has a true passion for authentic watches that have accompanied his two-wheeled adventures for many years, from the Indian Ocean to Africa and Latin America!
