Rolex GMT-Master II 40 mm 126710GRNRJ1 Steel Black

The Rolex GMT-Master II has long occupied a singular position in watchmaking history, born from a 1950s partnership with Pan Am airlines to give pilots and navigators a reliable way to track two time zones simultaneously. Over the decades it evolved from a tool watch into one of the most coveted luxury sport watches in the world, and the reference 126710GRNRJ1 represents the model at its most refined and most sought-after. Introduced in 2019, this iteration married the warmly nostalgic two-tone black and brown "Root Beer" ceramic bezel — a color combination that dates back to the gold-and-steel GMT-Masters of the 1980s — with the sophisticated five-link Jubilee bracelet, creating a watch that feels simultaneously retro and thoroughly modern.

The case measures 40mm in Rolex's proprietary Oystersteel, an alloy in the 904L steel family renowned for its exceptional resistance to corrosion and its ability to take and hold a mirror polish far longer than standard 316L steel. The 40mm diameter sits with authority on the wrist without tipping into oversized territory, a proportion Rolex has refined across generations of the GMT-Master II to feel just right for long-haul travel or daily urban wear. Water resistance is rated to 100 meters (330 feet), underpinned by the iconic Oyster case architecture with its screw-down crown.

The black dial is executed with Rolex's characteristic precision: applied hour markers and hands finished in white gold with a luminescent fill, and a distinctly legible layout that functions as well in a dimly lit aircraft cockpit as it does in a boardroom. The 24-hour graduated bezel in two-tone black and brown ceramic (cerachrom) allows at-a-glance reading of a third time zone or AM/PM differentiation for the GMT hand — a practical complication delivered with elegant restraint. The Jubilee bracelet in Oystersteel adds a dressy counterpoint to the sporty case, its five-link construction offering a supple, comfortable drape on the wrist.

Powering the 126710GRNRJ1 is a Rolex automatic movement with bidirectional rotor winding — the same caliber family that drives the broader GMT-Master II line — featuring Rolex's independently adjustable GMT hand that can be set in one-hour increments without stopping the running seconds, a crucial convenience for frequent travelers crossing time zones mid-flight. The movement reflects decades of in-house refinement and carries Rolex's Superlative Chronometer certification, guaranteeing accuracy performance tested after casing.

The reference 126710GRNRJ1 has proven nearly impossible to acquire through authorized Rolex dealers since launch, earning a place on lengthy waiting lists and commanding strong market demand among collectors and enthusiasts alike. Its combination of historical resonance — recalling the classic Root Beer palette — with modern materials, the new-generation case architecture, and the Jubilee bracelet makes it uniquely versatile: equally at home as a travel companion, a daily wearer, or a centerpiece of a serious collection. Demand has consistently outpaced supply, which means pre-owned examples in excellent condition represent a genuinely compelling opportunity.

At Bizak & Co., every pre-owned Rolex is certified authentic before being offered for sale, giving buyers the confidence of a knowledgeable dealer's verification without the retail waiting list. Whether you are buying your first GMT-Master II or adding the 126710GRNRJ1 to an existing Rolex collection, our team is ready to answer your questions and facilitate a smooth purchase. Browse our full inventory at bizakandco.com or reach out directly — opportunities to buy this reference online at fair market value do not last long.