Rolex 116710LN GMT Master II Ceramic SS / SS (30157)

30157 Rolex 116710 GMT Master II, 116710LN, stainless steel on a stainless steel bracelet, automatic, date, second time zone, 24 hour hand, COSC, black dial, black ceramic bezel, diameter: 40 mm, thickness: 12 mm, sapphire crystal, water resistant to 100 meters, scramble series. like New with original box and papers dated March 2017.

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More about Rolex 116710LN GMT Master II Ceramic SS / SS

This is a 904L stainless steel Rolex GMT Master II 116710LN. It includes an integral stainless steel Oyster bracelet with a folding Oysterlock safety clasp and an Easylink 5 mm. comfort extension link. The three-body case is polished and brushed, with a black cerachrom graduated and reeded bi-directional bezel, a sapphire crystal, a protected Oyster Triplock winding crown, and a screw-down back. The bezel measures a second, 24-hour time zone with a green 24-hour hand. The dial is black with luminous baton, round, and triangular hour index markers, and luminous steel skeleton hands with the distinctive Rolex symbol on the hour hand. The date aperture is at 3 o'clock and it's magnified with a Cyclops lens bubble. It's water resistant to 100 meters (330 feet), and it's COSC certified (officially certified Swiss chronometer).

This Rolex GMT Master II 116710LN has a mechanical automatic self-winding calibre 3186 movement that's rhodium-plated. It's constructed with 25 jewels, a shock absorber mechanism, and a straight-line lever escapement. It has a monometallic balance adjusted to cold, heat, and 5 positions, and a self-compensating Breguet balance spring. It is equipped with a Rolex blue Parachrom hairspring made from a paramagnetic alloy including zirconium and niobium; it's resistant to magnetic fields, temperature changes, and shock. The case, dial, and movement are all signed.

The Oyster bracelet was first introduced in the late 1930s, and the original GMT-Master debuted in 1955. The GMT-Master II was unveiled in 1955, and the Rolex GMT Master II 116710LN was introduced in 2005 and updated in 2007. The perpetual automatic mechanism is energized by the natural movement of the wrist with a half-moon oscillating weight that pivots freely in both directions. The rotor continuously winds the movement's mainspring, providing a constant and stable source of energy.