Few watches carry a nickname the way the Pepsi does. The red and blue bezel combination has been part of the GMT-Master's identity since 1955, when Rolex introduced the reference for Pan American World Airways pilots navigating multiple time zones on transatlantic routes. The 126710BLRO brought that color scheme back to the steel GMT-Master II in 2018 after a long absence, and the response from collectors made it immediately clear how much the combination had been missed. The GMT-Master II Pepsi 40mm 126710BLRO with a black dial is available at First Class Timepieces, and it remains one of the most sought-after steel Rolex references in the current market.

The Pepsi Bezel and What It Actually Means

The red and blue Cerachrom bezel on the 126710BLRO is not simply a color choice. It is a functional display. The red half of the bezel corresponds to daytime hours on a 24-hour scale, the blue to nighttime hours. When the GMT hand is set to a reference time zone, a glance at the bezel tells the wearer immediately whether it is day or night at that location without requiring any mental conversion. It is an elegant solution to a practical problem, and it is one that the original 1955 GMT-Master deployed in aluminum before Rolex's development of Cerachrom made the two-color ceramic bezel possible decades later.

The engineering required to produce a two-color Cerachrom bezel is considerably more complex than a single-color version. Ceramic cannot be painted or dyed after firing, which means the color differentiation must be achieved through the material's composition and the sintering process itself. Rolex spent years developing the process that produces the clean demarcation line between the red and blue halves, and the consistency of that line across production is one of those manufacturing achievements that reads as obvious once achieved and is anything but.

Steel and the Jubilee Bracelet

The 126710BLRO is offered on both the Oyster and Jubilee bracelets, and the Jubilee version represents a pairing that most collectors consider the definitive configuration. The five-link Jubilee bracelet has been part of the Rolex catalog since 1945, originally developed for the Datejust, and its use on the GMT-Master II in the 126710BLRO references the original Pepsi GMT references that wore the Jubilee before the Oyster became the sport bracelet standard. On the wrist the Jubilee drapes with a flexibility that the Oyster's three-link construction does not provide, and the overall wearing experience is softer and more comfortable for extended daily use.

The Oystersteel case and bracelet finish on the 126710BLRO reflects the refinement that Rolex has brought to the 40mm GMT-Master II over successive generations. The proportions are tighter than the 40mm cases that preceded the current generation, and the lug profile creates a case that wears closer to its measurement than earlier references did. At 40mm with the Jubilee, the Pepsi sits correctly on a broad range of wrist sizes without the case presence becoming a distraction.

Caliber 3285 and the Generation It Defines

The movement inside the 126710BLRO is the Caliber 3285, which Rolex introduced with the current generation of GMT-Master II. The 3285 replaced the 3186 that had powered the previous generation and brought meaningful improvements across several performance metrics. The Chronergy escapement, developed in-house and patented by Rolex, improves energy efficiency by approximately 15 percent compared to the Swiss lever escapement it replaces. The Parachrom hairspring, also proprietary to Rolex, provides resistance to magnetic fields and temperature variation that standard hairspring alloys cannot match.

The 3285 offers a 70-hour power reserve, up from the 48 hours of the 3186, and maintains Rolex's Superlative Chronometer certification, which requires accuracy of plus or minus two seconds per day after casing. The practical consequence of these improvements is a movement that requires less frequent winding, performs more consistently across environmental variation, and holds its accuracy specification over longer service intervals than its predecessor. These are real improvements for anyone who wears the watch daily rather than rotates it.

The Black Dial Decision

The 126710BLRO is available in black and in a meteorite configuration, and the black dial is the version that most clearly serves the watch's functional identity. Against the red and blue bezel, a black dial creates a clean visual hierarchy: the bezel does the color work, the dial provides the legibility foundation. The applied Chromalight hour markers and hands read clearly against the black surface under any lighting condition, which matters on a tool watch designed for use across time zones and schedules that do not always align with daylight.

Black also has the practical advantage of reading consistently over time. Dial aging on black Rolex references tends to be subtle and even, without the uneven fading that affects lighter dials exposed to UV over extended periods. For a watch intended for daily wear across many years, that stability is a genuine consideration rather than a minor detail.

Why the Pepsi Holds Its Position

The collector conversation around the GMT-Master II has grown considerably more complex over the past decade as Rolex has expanded the reference with new materials and bezel configurations. The Batman, the Root Beer, the Sprite: each has developed its own following and its own market logic. The Pepsi sits above all of them in terms of historical significance and cultural recognition, and that position has proven durable across multiple market cycles. The red and blue bezel is the one that started the GMT-Master story, and its return in Cerachrom on the 126710BLRO reconnected the current generation of collectors to a lineage that the absence of a steel Pepsi had interrupted for years.

The 126710BLRO at First Class Timepieces is the reference that needs the least explanation to the widest audience. For those considering a Rolex GMT-Master in New York, the Pepsi is where the conversation about this reference begins and, for many collectors, where it ends.