Rolex GMT Master-II 40 mm 126718GRNRBJ Yellow Gold Black

The Rolex GMT-Master II 126718GRNRBJ is one of the most coveted references in the GMT-Master II collection, presenting the iconic dual-time-zone complication in a lavish 40mm case crafted entirely in 18k yellow gold. Since its introduction, the GMT-Master family has been synonymous with precision travel timekeeping, originally developed in collaboration with Pan American World Airways for intercontinental pilots who needed a reliable way to track two time zones simultaneously. Today the GMT-Master II stands as one of the most recognized and sought-after sport-luxury watches on the planet, and the yellow gold iteration elevates the formula to its most prestigious expression.

The case measures 40mm in diameter — a size that has long defined the GMT-Master II silhouette — and is constructed entirely in Rolex's proprietary 18k yellow gold, lending it an immediately recognizable warmth and brilliance on the wrist. The Oyster case retains water resistance to 100 meters (330 feet), underpinning its credentials as a genuinely functional sports watch despite its precious-metal construction. The crown-protected winding system and screw-down case back ensure the movement remains well protected in everyday wear.

The black dial of the 126718GRNRBJ provides bold, high-contrast legibility against the gold case and indexes, creating an aesthetic tension between precious-metal luxury and tool-watch seriousness that defines the best Rolex sport references. The ceramic bezel — a hallmark of the current GMT-Master II generation — is virtually scratch-proof and retains its color indefinitely thanks to Rolex's Cerachrom material, meaning this watch will look as striking decades from now as it does today. The bidirectional rotatable bezel allows the wearer to track a third time zone at a glance, adding genuine utility to the watch's considerable visual appeal.

Power comes from Rolex's automatic movement, a self-winding caliber that drives the independent, independently settable GMT hand — the defining mechanical feature of the GMT-Master II that separates it from the original GMT-Master. The movement is housed within the sealed Oyster case and regulated to meet Rolex's exacting Superlative Chronometer standards, reflecting the manufacture's commitment to accuracy and reliability. No guesswork is required: this is a watch designed and built to perform across decades of continuous service.

The five-piece Jubilee bracelet is the perfect finishing touch on this reference, its elegantly linked construction softening the overall silhouette compared to the Oyster bracelet and hinting at the dressy character appropriate for a solid gold GMT-Master II. Introduced by Rolex in 1945 to celebrate the Datejust, the Jubilee bracelet has become one of the brand's most beloved and recognizable designs, and on the 126718GRNRBJ it adds a layered visual richness that complements the yellow gold case beautifully. The concealed Oysterclasp ensures security without interrupting the bracelet's clean aesthetic lines.

At Bizak & Co., we are proud to offer this 126718GRNRBJ as a certified authentic, brand-new example — a rare opportunity to acquire one of Rolex's most prestigious and difficult-to-source references in pristine, unworn condition. Whether you are a seasoned collector adding a statement gold piece to your rotation or a first-time buyer seeking the ultimate expression of sport-luxury watchmaking, this GMT-Master II represents an exceptional acquisition. Visit bizakandco.com or contact our team directly to discuss availability, pricing, and secure purchase options for this remarkable timepiece.