ZRC has introduced two new Grands Fonds MN64 Titanium editions, moving its French Navy born dive-watch formula into grade 5 titanium with a lighter case, refined ergonomics and a choice between full metal and high-contrast rubber.
A French Navy silhouette now in grade 5 titanium
The 41.5mm case keeps the Grands Fonds signature intact, with its angular architecture, 6 o’clock crown and unmistakable stance on the wrist.
Moving to grade 5 titanium is the meaningful change, because it reduces the perceived weight while preserving the purposeful, overbuilt character that has long defined this line.
ZRC has also reduced the thickness by 1mm compared with earlier iterations, a small but useful adjustment on a watch engineered for extreme depth.
The crown and bezel systems remain the real story
The MN64 is far more than a vintage-flavoured diver, with 3,000 metres of water resistance, a patented caseback system inspired by submarine hatches and a sapphire crystal measuring roughly 5mm thick.
The Crown Protection System prevents the watch from being worn if the crown is not fully screwed down, while the ECS bezel is designed to let water pass through the mechanism to help clear salt and debris after immersion.
It is an unusually practical set of solutions, and it explains why the Grands Fonds still feels separate from most modern professional divers.
Black titanium restraint or blue dial with yellow rubber
The Full Titanium reference uses a sunray black dial with applied markers and a date window, paired with a ladder-style titanium bracelet for the most monochromatic and discreet configuration.
The Titanium Rubber version changes the tone with a gradient blue-to-black dial and a yellow FKM rubber strap, trading the instrument-like calm of the bracelet model for a more openly aquatic personality.
Both dials use bold hands and applied metal indices with Super-LumiNova X1, while the blue version adds SLN 3D Lumicast indices for a more dimensional luminous treatment.
A slim automatic movement and May 2026 pricing
Inside is the Sellita SW300-1 in Elaboré grade, running at 28,800 vibrations per hour with an approximate 56-hour power reserve and regulation around plus or minus 5 seconds per day.
The Full Titanium model is priced at CHF 4,590, while the Titanium Rubber edition is CHF 3,990, with availability scheduled from May 2026.
For collectors who want a serious dive watch with military lineage and unusual engineering rather than another familiar case shape, these titanium MN64 editions sharpen one of the more distinctive profiles in the category.
