Rolex GMT-Master II Anniversary Green Hand 18kt Yellow Gold & Stainless Steel "Traveller" Dual Timezone with Oyster Architecture Monobloc Middle Case, Bidirectional Rotatable 24-Hour Graduated Bezel with Black Cerachrom Insert in Ceramic  with Engraved Numerals and Graduations, Black Dial with Luminescent Hour Markers and Hands, Green GMT Hand, 18kt Yellow Gold Oysterlock Bracelet  with Easylink 5mm Comfort Extension Link, Screw-Down Crown with Triplock Triple Waterproofness System, Superlative Chronometer Rolex Manufacture Caliber Self-Winding Automatic Movement

The 40mm diameter solid three-body case, downturned lugs, bracelet, and flat 18k bezel are polished and brushed. It has a black Cerachrom graduated and reeded bi-directional bezel, with a second, 24-hour time zone with large gold Arabic numeral hour markers, and a central green 24-hour hand. It includes an integral stainless steel Oyster bracelet with a folding Oysterlock safety clasp and an Easylink 5 mm. comfort extension link. It includes a scratch-resistant sapphire crystal, a protected Oyster Triplock winding crown, and a solid screw-down case back. The dial is black with luminous baton, round, and triangular hour index markers, a center sweep second hand with a luminous dot indicator, 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 (Certified Official Swiss chronometer). The 12mm thick case, dial, and movement are all signed.

This Rolex GMT Master II 116713LN has a mechanical automatic winding caliber 3186 movement. It’s rhodium-plated, and 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 mechanism oscillates at a frequency of 28,800 mph (4 Hz).