Rolex GMT-Master II "50th Anniversary" Stainless Steel with Monobloc Middle Case, Bidirectional Rotatable 24-Hour Graduated Bezel with Black Cerachrom Insert in Ceramic  with Engraved Numerals and Graduations, Black Dial with Anniversary Green GMT Hand, Luminescent Hour Markers and Hands, Stainless Steel 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 with Paramagnetic Blue Parachrom Hairspring Oscillator, 40mm - Fitted on a Gorgeous Bespoke Madrid Spain Green Camo Rubber Strap

This Rolex GMT-Master II has a mechanical automatic winding caliber 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).

Reference No. 116710LN