ZRC has a strong expertise in the field of the strains studies linked to the programmed deformation of materials, which guarantees the manufacture of waterproof watches at very great depth (5100M) without resorting to an helium valve or the presence of gel in the case: In addition, it also reduces the thickness of the case making the watch more comfortable to wear. Indeed, sapphire crystal, steel and/or titanium cases and ceramics do not react in the same way to pressure and temperature variations. This recognized expertise allows the brand to offer reliable, simple and effective watches.

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. A unique system 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.

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

The new Grands Fonds 300 is equipped with an automatic adjustable bracelet, which allows it to be worn over a diving suit. This unique embedded spring system automatically adapts to the diameter of the wearer’s wrist for unparalleled comfort. No adjustments are required, as two links on either side of the case extend to accommodate the new diameter.

The new French Navy watches and new Grand Fonds 3000 ZRC is equipped with a brand new rubber strap compatible for both tongue & butterfly buckles. Inspired by the design of the metal band it is very comfortable and available in many colors.

The SELLITA movement of the ZRC Grands Fonds 3000 is composed of 26 rubies wheels, on which Incabloc shock protection was used. Extremely precise, the balance performs 28,800 oscillations per hour. With a mechanism diameter of 25.6 mm, it offers a power reserve of 38 hours.

The setting is 7 sec/day (with an amplitude of 7 sec/day = from 0 to +14 sec/day) which gives extreme precision to the Grands Fonds 300. As a reminder, a COSC certification tolerates -4 sec to + 6 sec/day, an amplitude of 10 sec/day.