Description
ZRC has finally taken its 3,000-metre Grands Fonds MN64 diver to full Grade-5 titanium. The two new references — GF4221221113 "MN64 Full Titane" on a titanium bracelet, and the MN64 Titane Rubber on a vulcanised rubber strap — bring a slightly luxurious dimension to a watch with one of the most authentic mid-century military diver pedigrees in French horology, while keeping every safety system (submarine-hatch case-back, CPS crown lock, 3,000 m water resistance, left-side crown) intact.
This is a serious reduction in wrist weight — Grade-5 titanium versus the original 904L stainless of the steel MN64 — without compromising the structural integrity that earned ZRC its Marine Nationale contract more than sixty years ago. Final European pricing is to be confirmed, but is expected in the EUR 4,900–5,400 range based on the steel MN64's EUR 4,290 retail and the typical full-titanium premium.
Design
The MN64 Titanium retains the case architecture that defines the family. The 40.5 mm case wears smaller than the diameter suggests — credit the tight lug-to-lug, the left-side crown placement at 9 o'clock (so the crown does not dig into the wrist when the diver bends), and the unidirectional steel-insert bezel that sits flush with the case. The patented hexagonal submarine-hatch case-back with six lobes distributes pressure radially across the case, and the CPS (Crown Position Security) safety prevents the watch from being worn unless the crown is fully screwed down — a mechanical lock against accidental flooding, sold against actual French Navy commercial-diver rentals.
The Full Titane execution carries a black sunray dial with applied luminous indices, sword-shaped hour and minute hands generously filled with Super-LumiNova, and a date window at 6 o'clock — clean, instrument-style, no decoration beyond the brand wordmark. The Titane Rubber drops the date for cleaner symmetry and adopts a gradient blue-to-black dial that shifts colour with the angle of light. Both are equipped with a sapphire crystal with anti-reflective coating, screw-down crown, and 3,000 m of water resistance — a depth rating tested in chambers reportedly beyond 5,000 m.
Specifications
- References: GF4221221113 (Full Titane), TBC (Titane Rubber)
- Case diameter: 40.5 mm
- Case material: Grade-5 titanium
- Bezel: Unidirectional, steel insert
- Crown: Left-side at 9 o'clock, screw-down, with patented CPS (Crown Position Security)
- Case-back: Patented hexagonal submarine-hatch architecture (six-lobe pressure distribution)
- Crystal: Sapphire with anti-reflective coating
- Water resistance: 3,000 m (tested beyond 5,000 m in controlled conditions)
- Dial: Black sunray with applied indices and date at 6 (Full Titane) — or gradient blue-to-black, no date (Titane Rubber)
- Hands: Sword-shaped, Super-LumiNova filled
- Movement: Soprod Newton P092 automatic, COSC chronometer-certified
- Frequency: 28,800 vph (4 Hz)
- Power reserve: 44 hours
- Functions: Hours, minutes, sweep seconds, date (Full Titane only)
- Bracelet / strap: Brushed-and-polished Grade-5 titanium bracelet with diver-extension folding clasp (Full Titane); or vulcanised rubber strap with titanium pin buckle (Titane Rubber)
- Production: Regular, no announced cap
- Price: TBC at launch — expected EUR 4,900–5,400 range
What's Exciting
The MN64 designation is literal and underrated: this watch is the modern descendant of the original ZRC Grands Fonds 300, which was the standard-issue diver of the French Marine Nationale — issued in 1964, alongside the Auguste Reymond pieces and the Tudor Submariner military variants. Tudor's Marine Nationale pedigree is widely celebrated; ZRC's, somehow, is not. The titanium edition is the lightest 3,000 m diver ZRC has ever made, and the patented submarine-hatch case-back and CPS crown lock are not marketing devices — they are mechanical safety systems engineered against actual commercial-diver rental use.
At the expected EUR 4,900–5,400 the value play is meaningful. There are very few 3,000 m Grade-5 titanium divers on the market with a genuine mid-century military issue history, and even fewer that haven't been rebranded into hype-driven luxury (compare to the inflated pricing of certain Tudor Pelagos or Doxa SUB Mil-Spec editions). For collectors who want a tool diver with provenance and modern materials, the MN64 Titanium is the most credible option in this price tier.
History
Zuccolo Rochet & Cie — ZRC — was founded in Geneva in 1904. The brand specialised in robust technical watches early, but its defining moment came in 1964, when the French Marine Nationale awarded it the contract for the standard-issue combat-diver wristwatch — the original Grands Fonds 300. That contract placed ZRC alongside Tudor, Aquastar and a handful of Italian houses with verified mid-century military diver pedigree, and the patented submarine-hatch case-back and left-side crown introduced on the Grands Fonds remain ZRC's design signatures sixty-two years later.
The brand was effectively dormant from the 1980s into the 2010s before being revived under the ZRC 1904 name. The modern MN64 line launched in 2018 as the official heir to the original 300 m piece and has been produced in steel, bronze and DLC executions over the past seven years. The 2026 titanium release sits at the top of the GF range — and the lightest 3,000 m ZRC ever made.
