The ZRC Grands Fonds 300 MN64 Osium (Reference GF42118) is a refined evolution of the legendary MN64 diver’s watch, named for the silvery, industrial sheen of its Osium-inspired aesthetic. Fusing vintage dive heritage with modern materials and precision engineering, the Osium delivers striking visuals and professional-grade performance.
With its deep blue sunray dial and clean, purposeful lines, the MN64 Osium captures the essence of classic dive watches while embracing contemporary sophistication.
Material: Non-magnetic 316L stainless steel, compliant with ISO764 standards (4800 A/m)
Diameter: 41.5 mm.
Bezel: Unidirectional rotating bezel with 60-minute scale and black ceramic insert, equipped with the ECS® (Easy Clean System) for easy maintenance after saltwater exposure.
Crown: Positioned at 6 o’clock, protected by the proprietary Crown Protection System™ featuring an inverted screw thread and dual-seal architecture to ensure watertight integrity.
Glass: 3 mm domed sapphire crystal with anti-reflective treatment.
Water Resistance: Rated for 1,000 meters, and pressure-tested to 1,500 meters.
Caliber: Swiss-made Sellita SW200-1 automatic movement.
Power Reserve: Approximately 38 hours.
Functions: Hours, minutes, seconds, and date.
Dial: Blue sunray dial with Super-LumiNova-coated markers for maximum underwater visibility.
Hands: Plongeur-style hands with Super-LumiNova for optimal legibility in all conditions.
Strap: Textured blue rubber strap, engineered for durability and comfort during extended underwater missions.
Buckle: Stainless steel pin buckle.
Effortlessly bridging tradition and modernity, the MN64 Osium is a professional-grade dive instrument that also makes a bold everyday statement—ideal for those who value performance, history, and timeless style.
