1964 French Navy Re-issue

CHF 2,590.00
All included*
Reference : GF40148

*Delivery duty paid and freight included

Sizing information

NATO Strap size
There are not enough products in stock

ECS™ Patent pending (Easy Clean System)

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.


Crown Protection System™

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.


Nato strap

The new Grands Fonds 300 is equipped with an exclusive 2 pieces NATO strap, which allows it to be worn over a diving suit. This unique embedded NATO configuration automatically adapts to the diameter of the wearer’s wrist for unparalleled comfort. No further adjustment is required, it accommodates to any diameter since existing in 3 sizes, S-M & L.


ETA 2824-2 elaborated movement or SELLITA SW200-1 elaborated

The, ETA or SELLITA, movement of the ZRC Grands Fonds 300 is composed of 25-ruby wheels, on which Incabloc shock protection was used. Extremely precise, the balance performs 28,800 half-oscillations per hour. With a mechanism diameter of 25.6 mm, it offers a power reserve of 38 hours.



Monobloc case
Screwed case back & crown


40,5 mm


Nonmagnetic 316L Steel
​ISO764 Standard: 4800 A/m


ECSTM system
(Patent pending N°1462496)
Unidirectional 60 divisions rotating bezel


Located at 6H (Crown Protection SystemTM). Inverted screwed thread with dual sealing.


Sapphire 3 mm padded

Water resistance

Up to 300 meters



ETA “Elaborated” 2824-2 or SELLITA “Elaborated” SW200-1


+ 7sec/day


(± 7sec/day) = from 0 to 14 sec/day max.


Automatic winding

Power reserve

38 hours


Hour - Minutes - Seconds

Synthetic NATO strap


Synthetic NATO strap made in 2 parts available in 3 sizes S-M-L


Single buckle

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