The Grands Fonds 3000, developed by the Geneva-based brand ZRC is the first watch in the world able to withstand immersion to a depth of 5,000 meters without a helium escape valve and with a thickness of less than 20 millimeters.


The Grands Fonds, developed by ZRC back in 1958 and embraced as the French National Navy official watch in 1964, stood out with its robustness and technical sophistication specially-designed for diving down to depths of 300 meters.

In 2015, the brand launched a re-issue of this icon. The Grands Fonds 300 re-edition watch features the emblematic screwed crown at 6 o’clock as well as technological innovations like the Crown Protection SystemTM and the Easy Clean System (ECSTM).

ZRC GRANDS FONDS 3000 diving watch

The Grands Fonds 3000 is the new addition to the brand’s diving timepieces collection. Although this virtually indestructible timepiece flaunts undeniable family resemblance with its elder sibling from the 1960s, nonetheless it boasts its own character and brave personality.

ZRC GRANDS FONDS 3000 meters diving watch

Its 42 mm-diameter, 19.5 mm-thick grade 2 titanium case enables the elements which make it up to compress together and as such prevent any gaseous molecules from penetrating. Moreover, the 316L steel case back equipped with a titanium double seal and clamp ring resists pressure and absorbs warping.

ZRC GRANDS FONDS 3000 diving watch case back

The case is complemented by a 60-notch unidirectional rotating bezel topped with a ceramic ring, another light technical material which is practically scratch-proof and immune to ultraviolet rays which tarnish colors. Its black-hued navy blue color weaves a striking contrast with the blue-glowing white Super-LumiNova® coated phosphorescent markers.

ZRC GRANDS FONDS 3000 watch dial

The dial, protected by a 5 millimeter-thickcamberedsapphirecrystalwhichrefutesanyalteration in terms of readability, actually traces the sensations experienced by a diver as they descend to the depths through vertical gradient tones beginning with indigo and gradually darkening to become totally black.

ZRC GRANDS FONDS 3000 watch dial

Traditional skeletonized magnum-style hands, adorned with Super-LumiNova®, fan out from the center of this blue-hued disc and hover over an hour chapter featuring indexes and three white Arabic numerals. A silvered one points to the hours whilst a bright red varnished one ticks past the minutes.


The seconds are marked by a “lollipop” direct-drive tipped with a luminescent dot and vermilion dash. These features are driven by the Sellita SW200-1 caliber, a well-proven self-winding mechanical movement which vibrates at a standard frequency of 4 Hertz and delivers a power reserve of 38 hours.

The Grands Fonds 3000 watch comes with a natural injected rubber strap attached by a specially-designed ZRC titanium buckle.

Technical details

Model: Grands Fonds 3000

Swiss Made

SELLITA “Elaborated” SW200-1
Power reserve: 38 h
Oscillation: 28 800 a/h

Hours, Minutes and Seconds

Titanium Grade-2 case
Non magnetic 316L shielded steel caseback with titanium double seal and clamp ring
Screwed crown and caseback
Glass: 5 mm padded sapphire
Pressure resistance: 3000 m (301 bars)
Tested depth: 5000 m (501 bars)
Bezel insert: Ceramic
Antimagnetic: ISO764 Standard, 4800 A/m

Case diameter: 42mm
Lug to lug: 49.2mm
Lug width: 24mm
Dial opening: 30.7mm
Thickness: 19.5mm (including crystal)

Rubber strap with titanium tongue buckle

Retail price
CHF 3,990.00

Special features


The ECS™ is a technical solution to an issue encountered by the mine clearance divers of the Marine Nationale during their many dives: salt crystallizing in the gaps between the bezel and case, thus impeding its rotation. For the 2015 re-issue of the Grands Fonds 300, ZRC has developed and patented a functional solution – the ECS™ was born.

ZRC GRANDS FONDS 3000 watch ecs

This unique system is useful for cleaning the inside of the bezel by circulating fresh water that dilutes and evacuates the sea salt. The ECS™ is the ultimate tribute to the original Grands Fonds and is perfectly in tune with the brand’s identity.

Crown Protection SystemTM

During diving 100% safety is guaranteed thanks to this exclusive strap system using retractable lugs. It is now impossible to place the watch in water without screwing the crown back into its original position.

ZRC GRANDS FONDS 3000 watch with Crown Protection System

If the crown is not screwed down, the strap cannot be correctly repositioned. This effective method prevents oversights that can lead to technical difficulties.