Rolex GMT Master-II 40 mm 126713GRNRBJ1 Steel/Yellow Gold Black

The Rolex GMT-Master II 126713GRNRBJ1 is among the most coveted references in the modern Rolex sports-watch catalog, blending the legendary dual-time-zone function with an exquisite Rolesor construction that pairs Oystersteel with 18k yellow gold. The GMT-Master lineage dates to 1955, when Rolex developed the original GMT-Master in partnership with Pan American World Airways to help pilots track two time zones simultaneously. Decades of refinement culminated in the GMT-Master II, which introduced an independently adjustable local-hours hand — a genuine complication that separates it from its predecessor and makes it indispensable for frequent travelers and aviation professionals alike.

The 40mm Oyster case of the 126713GRNRBJ1 strikes an ideal balance between legibility and wearability, fitting a wide range of wrist sizes with authority. The case is constructed in Rolex's proprietary Oystersteel — a 904L stainless steel alloy prized for its exceptional corrosion resistance and high-polish finish — accented by 18k yellow gold on the bezel, crown, and Jubilee bracelet center links. This Rolesor combination, affectionately nicknamed "Root Beer" by collectors for its warm color palette, gives the watch a character that straddles sport and dress effortlessly.

The bidirectional rotatable bezel is fitted with a two-tone black and brown Cerachrom insert, Rolex's proprietary ceramic compound that is virtually scratch-proof and immune to ultraviolet fading. The graduated 24-hour scale on the bezel allows the wearer to read a third time zone at a glance, while the bold black dial offers superb legibility through its luminous Chromalight hour markers and Mercedes hands. The Jubilee bracelet — a five-piece link design originally introduced in 1945 — adds a refined, dressy sensibility that distinguishes this reference from GMT variants wearing the sportier Oyster bracelet.

Power comes from an automatic movement, as expected from a contemporary GMT-Master II reference, providing reliable self-winding performance suited to daily wear. The watch carries a water resistance rating of 100 meters (330 feet), reflecting the robust Oyster case construction with its screw-down winding crown and caseback — more than adequate for swimming, snorkeling, and the demands of everyday professional life. Whether worn in the boardroom or on a long-haul flight, the 126713GRNRBJ1 performs without compromise.

From a collector's standpoint, the 126713GRNRBJ1 occupies a unique position: it is one of the few modern Rolex references that pairs the Jubilee bracelet with the two-tone Rolesor case, a combination that generates extraordinary demand and supports strong long-term value retention. Production of this configuration is limited relative to demand, meaning certified pre-owned examples in excellent condition are actively pursued by enthusiasts worldwide.

At Bizak & Co., every pre-owned Rolex we offer is certified authentic before it reaches our clients. When you buy a used Rolex GMT-Master II 126713GRNRBJ1 online through Bizak & Co., you benefit from our team's deep expertise, rigorous authentication standards, and commitment to a transparent buying experience. We invite you to reach out directly to learn more about this reference, ask questions, and secure your purchase with complete confidence.