Rolex GMT Master-II 40 mm 126713GRNRBJ Steel/Yellow Gold Black

The Rolex GMT-Master II is one of the most storied sports watches ever made, originally developed in the 1950s in collaboration with Pan American World Airways to help pilots and crew track two time zones simultaneously. Decades of refinement have produced the modern reference 126713GRNRBJ, a watch that honors that heritage while incorporating every technical and aesthetic advancement Rolex has introduced to the line. Wearing the GMT-Master II is a statement of purposeful luxury, equally at home in a cockpit, a boardroom, or a fine restaurant.

Reference 126713GRNRBJ is distinguished by its Oystersteel and 18k yellow gold construction, a combination that places it firmly in the two-tone tradition Rolex has maintained since the earliest days of the GMT-Master. The case measures a versatile 40mm in diameter, a size that has remained the hallmark of the GMT-Master II and suits a wide range of wrist sizes without sacrificing presence. The polished and brushed surfaces of the case and the flowing five-piece links of the Jubilee bracelet together create a depth of finish that is immediately recognizable to connoisseurs.

The dial is rendered in rich black, providing a high-contrast backdrop that makes every index, hand, and GMT hand instantly legible at a glance. Applied hour markers and the distinctive additional 24-hour hand work in concert with the bi-directional rotating bezel to allow the wearer to track a second time zone with precision. The bezel insert is crafted in Rolex's proprietary Cerachrom ceramic in the classic black and brown 'Root Beer' configuration—a colorway that has achieved near-mythical status among GMT-Master enthusiasts and collectors worldwide.

Powering the watch is Rolex's automatic movement, a self-winding mechanical caliber that reflects the brand's relentless pursuit of chronometric precision. The movement drives the independently adjustable GMT hand, allowing the local hour hand to be set in one-hour increments without disrupting the running of the watch—an enormously practical feature for frequent travelers. The Oyster case, with water resistance to 100 meters (330 feet), ensures the movement is sealed against dust, pressure, and moisture in everyday conditions.

Buying this reference from Bizak & Co. means acquiring a certified authentic, brand-new Rolex GMT-Master II 126713GRNRBJ with the confidence of a trusted luxury watch dealer. The 'Root Beer' two-tone GMT is consistently among the most sought-after references at retail and on the secondary market, making it not only a pleasure to wear but a sound addition to any serious collection. Contact Bizak & Co. today to inquire about availability, pricing, and secure purchase of this exceptional timepiece.