The 40 mm Oyster case of the rolex oyster perpetual milgauss replica, guaranteed waterproof to a depth of 100 metres (330 feet), is a paragon of robustness and reliability. The Milgauss is equipped with calibre 3131, a self-winding mechanical movement entirely developed and manufactured by Rolex. This component is produced using a micromanufacturing technology (UV-LiGA) that is entirely mastered in-house. The Oyster bracelet of the Oyster Perpetual Milgauss is very secure and comfortable to wear.
The characteristically shaped middle case is crafted from a solid block of particularly corrosion-resistant 904L steel. The fluted case back is hermetically screwed down with a special tool exclusive to Rolex watchmakers. The winding crown, fitted with the patented Twinlock double waterproofness system, screws down securely against the case. The crystal is made of virtually scratchproof green sapphire. The waterproof Oyster case provides optimal protection for the rolex oyster perpetual milgauss z blue replica watch high-precision movement.
Like all Rolex Perpetual movements, the 3131 is a certified Swiss chronometer, a designation reserved for high-precision watches that have successfully passed the Swiss Official Chronometer Testing Institute (COSC) tests. It includes Rolex-patented components to guarantee the level of resistance to magnetic interference for which it is named. The escapement of the Milgauss features a paramagnetic escape wheel made of a nickel-phosphorus alloy.
The oscillator, the true heart of the watch, has a blue Parachrom hairspring patented and manufactured by Rolex in an exclusive alloy of niobium and zirconium. Insensitive to magnetic fields, the Parachrom hairspring offers great stability when exposed to temperature variations and remains up to 10 times more precise than a traditional hairspring in case of shocks.
It is equipped with a folding Oysterclasp, designed by rolex milgauss replica. It also features the ingenious Rolex-patented Easylink rapid extension system that allows the wearer to easily increase the bracelet length by approximately 5 mm, for additional comfort in any circumstance.