THE OYSTER CASE, SYMBOL OF WATERPROOFNESS
A paragon of robustness and reliability, the 40 mm Oyster case of the new versions of the GMT-Master II is guaranteed waterproof to a depth of 100 metres (330 feet). The middle case of these versions is crafted from a solid block of Oystersteel or 18 ct yellow gold. Its case back, edged with fine fluting, is hermetically screwed down with a special tool that allows only Rolex watchmakers to access the movement. The Triplock winding crown, fitted with a triple waterproofness system and protected by an integral crown guard, screws down securely against the case. The crystal, which features a Cyclops lens at 3 o’clock for easy reading of the date, is made of virtually scratchproof sapphire and benefits from an anti-reflective coating. The waterproof Oyster case provides optimal protection for the movement it houses.
PERPETUAL CALIBRE 3285
The new versions of the GMT-Master II are equipped with calibre 3285, a movement entirely developed and manufactured by Rolex that was released in 2018 and introduced on the model the same year. A distillation of technology, this self-winding mechanical movement delivers outstanding performance in terms of precision, power reserve, convenience and reliability.
Calibre 3285 incorporates the patented Chronergy escapement, which combines high energy efficiency with great dependability. Made of nickel- phosphorus, this escapement is resistant to strong magnetic fields. The movement is fitted with a blue Parachrom hairspring, manufactured by Rolex in a paramagnetic alloy. The hairspring offers great stability in the face of temperature variations as well as high resistance to shocks. It is equipped with a Rolex overcoil, ensuring the calibre’s regularity in any position. The oscillator is mounted on the Rolex-designed, patented high-performance Paraflex shock absorbers, increasing the movement’s shock resistance. The oscillating weight is now fitted with an optimized ball bearing.
Calibre 3285 is equipped with a self-winding system via a Perpetual rotor. Thanks to its barrel architecture and the escapement’s superior efficiency, the power reserve of calibre 3285 extends to approximately 70 hours.
JUBILEE BRACELET AND OYSTERLOCK SAFETY CLASP
The new versions of the GMT-Master II are fitted on a Jubilee bracelet. Supple and comfortable, this five-piece link bracelet was specially created for the Oyster Perpetual Datejust, which was launched in 1945. The Jubilee bracelet of these new versions features the Oysterlock folding safety clasp, which prevents accidental opening. It is equipped with the Easylink comfort extension link, developed by Rolex, which allows the wearer to easily adjust the bracelet length by approximately 5 mm. On the version entirely in 18 ct yellow gold, the bracelet also includes patented ceramic inserts – designed by the brand – inside the links to enhance its flexibility on the wrist and its longevity