Rolex GMT Master II

Overview

The Rolex GMT-Master II 126710BLNR is a modern travel watch with unmistakable Rolex identity, practical dual-time functionality and a particularly distinctive colour combination. Its black and blue Cerachrom bezel has earned the nickname “Batgirl”, while the refined Oystersteel case and Jubilee bracelet give the watch a versatile character that can move comfortably between formal and casual settings.

Originally developed for pilots and frequent travellers, the GMT-Master II remains one of the most recognisable professional watches ever made. This 40mm reference combines the familiar proportions of the classic GMT-Master design with contemporary materials and Rolex engineering. The result is a watch that offers useful time-zone tracking without sacrificing the everyday refinement expected from a modern Rolex.

As part of our selection of Rolex watches, the 126710BLNR appeals to buyers looking for a genuinely capable mechanical watch with strong visual presence. The blue and black bezel is immediately recognisable, yet sufficiently restrained to complement a wide range of clothing and occasions.

Brand and reference history

Rolex introduced the original GMT-Master in the 1950s in response to the demands of international aviation. The watch enabled wearers to read local time from the conventional hour hand while monitoring a second time zone using a 24-hour hand and graduated bezel. That practical layout soon found an audience far beyond the cockpit, becoming a defining part of Rolex’s professional watch catalogue.

The GMT-Master II developed the concept further by allowing the independently adjustable local-hour hand to be set without interrupting the display of home time. This made the watch especially useful when travelling across time zones. Reference 126710BLNR belongs to the contemporary generation of GMT-Master II models and is distinguished by its Oystersteel construction, black and blue Cerachrom bezel and Jubilee bracelet.

The “BLNR” designation relates to the bezel colours: blue and black. In Rolex’s naming language, the combination is both descriptive and memorable, while the unofficial “Batgirl” nickname reflects the darker, more graphic appearance created by the two-tone bezel. It follows the earlier black-and-blue GMT-Master II design language while adding the Jubilee bracelet that gives this reference its own personality.

Dial, hands and design detail

The black dial provides a strong, legible background for the white gold applied hour markers and hands. Large luminous plots mark the hours, while the Mercedes-style hour hand, baton minute hand and slender seconds hand retain the visual language associated with Rolex sports watches. The central 24-hour hand is picked out in blue, creating a direct visual connection with the blue section of the bezel.

A framed date window sits at three o’clock beneath the familiar Cyclops lens. The magnification is both practical and characteristic of Rolex, making the date easier to read at a glance. The dial is deliberately uncluttered, with the GMT indications integrated into the design rather than competing with the primary time display.

The bi-directional 24-hour bezel is one of the watch’s defining details. Its blue and black Cerachrom insert is designed to resist ultraviolet exposure, corrosion and everyday scratching, helping the strong colour contrast remain stable over time. The blue portion commonly represents daylight hours and the black portion night-time hours, although the bezel can be rotated to support a range of time-zone readings.

Legibility is further supported by Rolex luminous material on the relevant hands and hour markers. In low-light conditions, the luminous display helps the wearer distinguish the primary time from the additional 24-hour indication. It is a thoughtful example of the GMT-Master II’s central purpose: information should be immediately accessible, even when travelling or changing environments.

Case, bracelet and wearability

The 40mm Oyster case is manufactured from Rolex Oystersteel, a corrosion-resistant steel selected for its durability and ability to retain a high-quality finish. Its combination of polished and brushed surfaces creates definition across the lugs and case sides without making the watch feel overly decorative. The familiar profile is robust enough for everyday use while remaining sufficiently balanced for office and evening wear.

A screw-down crown, protected by crown guards, contributes to the watch’s Oyster case architecture and water resistance. The crown carries the Rolex coronet and uses the brand’s secure winding and setting system. The solid caseback keeps the movement protected and maintains the discreet, tool-watch character expected from the GMT-Master II.

This reference is paired with a five-link Jubilee bracelet, an important part of its visual appeal. The smaller links create a more fluid appearance around the wrist than the broader three-link Oyster bracelet, while the centre links introduce a touch of brightness against the brushed outer surfaces. The bracelet is secured by an Oysterlock clasp with a practical Easylink comfort extension.

The bracelet’s flexibility helps the 126710BLNR feel refined rather than bulky. Its surfaces do show how the watch has been worn, particularly on a polished centre link, but the overall design is intended for regular use. As with any pre-owned watch, the precise condition of the case, bracelet, clasp and bezel should be assessed from the supplied photographs and confirmed with our team before purchase.

Movement and technical specification

Rolex equips the GMT-Master II 126710BLNR with its automatic calibre 3285. This movement was developed for the current generation of GMT-Master II watches and includes a second-time-zone display, independently adjustable local-hour hand and date indication. Its architecture is intended to deliver reliable performance for daily wear, whether the watch is used at home or while crossing international time zones.

The calibre incorporates Rolex’s Chronergy escapement, designed to improve energy efficiency while maintaining the robustness associated with the brand’s movements. It also uses a blue Parachrom hairspring, which is resistant to magnetic fields and less affected by temperature variations and shocks than conventional hairsprings. These features support dependable timekeeping in the varied conditions of modern travel.

The movement provides an extended power reserve of approximately 70 hours when fully wound. This is useful for owners who rotate several watches, as the GMT-Master II can remain running through a weekend when it has been fully powered. Rolex subjects the completed watch to its Superlative Chronometer standards, although actual performance can vary according to age, use, storage and service history.

Key specification details include a 40mm stainless steel case, black and blue Cerachrom 24-hour bezel, automatic GMT movement, date display, screw-down crown, Oysterlock clasp and Jubilee bracelet. The watch is designed for water resistance, but its seals should be checked periodically and tested by a qualified watchmaker if the watch is to be exposed to water after a period of ownership.

Sizing and how it wears

At 40mm, the GMT-Master II occupies a highly versatile position in the Rolex sports-watch range. It has enough wrist presence to feel substantial, yet it avoids the visual weight associated with larger modern cases. The moderate diameter works particularly well because the lugs are carefully proportioned and the bracelet tapers naturally from the case.

The Jubilee bracelet gives the watch a smooth, comfortable drape. Its articulated links allow it to follow the wrist closely, while the Easylink extension offers a small amount of adjustment when the wrist changes size during the day. A correct bracelet fit is important: the watch should sit securely without restricting movement, with the clasp centred beneath the wrist where possible.

The 126710BLNR is equally at home with a shirt and tailored jacket or with more relaxed clothing. The black dial and dark portion of the bezel keep the overall impression controlled, while the blue accents provide enough colour to distinguish the watch from a conventional black-bezel sports model. This balance is one reason the reference has become popular with both dedicated collectors and first-time Rolex buyers.

Wrist shape, bracelet adjustment and personal preference will influence how the watch feels. A buyer accustomed to smaller vintage watches may notice the contemporary solidity of the case, while those familiar with modern sports models will likely find the 40mm proportions immediately comfortable. We recommend considering the full case-and-bracelet presence rather than diameter alone when assessing fit.

Collectability and market value

The 126710BLNR has a strong position within the modern GMT-Master II family. Its blue and black bezel offers a distinctive alternative to more monochrome configurations, and the combination of Cerachrom technology with the Jubilee bracelet has become closely associated with this reference. The watch’s desirability is supported by its practical complication, recognisable design and broad international appeal.

Market value for a pre-owned Rolex depends on several variables, including condition, completeness, date of purchase, service history, bracelet state and whether the original presentation materials are included. The condition of the polished surfaces and Jubilee bracelet can be particularly important because these areas show wear more readily than brushed steel. Buyers should assess the individual watch rather than relying only on general reference-level expectations.

The GMT-Master II also has a useful place within a wider collection. It offers a different purpose from a chronograph such as the Rolex Daytona, focusing on travel and elapsed time-zone reading rather than stopwatch functionality. For collectors, that makes it a practical complement to other Rolex professional models rather than simply another sports watch.

Our listed price for this watch is £13,950.00. This figure relates to the individual example offered and should be considered alongside its stated condition, included accessories and available documentation. While no mechanical watch should be purchased solely as an investment, the 126710BLNR’s combination of brand recognition, usability and collector interest gives it enduring relevance in the pre-owned market.

Authenticity, condition and servicing

Authenticity is central when buying a high-value pre-owned Rolex. We assess the watch’s branding, case, bezel, dial, hands, bracelet, clasp and movement against the correct specifications for reference 126710BLNR. Particular attention is paid to the consistency of the components and to signs that might indicate replacement, alteration or inappropriate refinishing.

Condition is evaluated across the complete watch rather than judged from one feature. The case may display light marks associated with careful wear, while polished bracelet links can show hairlines more readily. The Cerachrom bezel is highly resistant to everyday damage, but it should still be inspected for chips, impact marks and evidence of unusual wear. Any condition comments should be read with the photographs and our direct assessment of the specific example.

Service history can influence both ownership confidence and future maintenance planning. If documentation has been supplied, it should be considered alongside the watch’s observed performance and overall condition. Where no recent service information is available, this does not automatically indicate a fault; it simply means that a future inspection or service may be appropriate depending on timekeeping, winding feel, power reserve and the owner’s intended use.

Rolex recommends servicing at intervals determined by model, use and environment rather than by a single universal timetable. A competent specialist should handle any inspection or maintenance, using appropriate equipment and replacement parts. Water resistance should always be tested after work involving the crown, crystal, case or seals. We can discuss the condition and servicing considerations for this individual watch before you commit to purchase.

Buying this watch from us

Buying a pre-owned Rolex should feel considered, transparent and properly supported. We provide clear information about the watch we are offering, including its reference, price and condition. Our aim is to help you understand the particular example in front of you, not simply the reputation of the model as a whole.

The Rolex GMT-Master II 126710BLNR is offered at £13,950.00. If you are considering the watch for regular travel, as an addition to a collection or as your first serious mechanical sports watch, our team can answer questions about fit, operation, condition and the accompanying items supplied with this example.

We can also help you compare the watch with other pieces in our gmt & travel watches collection. That may be useful if you are deciding between a GMT model, a different Rolex professional reference or another travel-focused complication. A clear comparison of case size, bracelet style, bezel layout and movement functionality can make the final decision easier.

Please contact us before purchase if you require further photographs, additional clarification or advice on suitability. We encourage buyers to ask specific questions, particularly where condition, bracelet sizing or documentation is important. Once you are satisfied that this is the right watch for you, our team can guide you through the next steps of purchasing this distinctive Rolex GMT-Master II.

Frequently asked questions

What is the Rolex GMT-Master II 126710BLNR?

The 126710BLNR is a modern Rolex GMT-Master II with a 40mm Oystersteel case, black dial, blue and black Cerachrom bezel and Jubilee bracelet. It displays local time, home time and a third time zone through its rotating 24-hour bezel.

Why is this Rolex called the “Batgirl”?

“Batgirl” is an informal collector nickname for the blue and black GMT-Master II on a Jubilee bracelet. The name refers to the dark, graphic appearance of the colour combination and helps distinguish it from other GMT-Master II configurations.

What movement powers the 126710BLNR?

The watch is powered by Rolex calibre 3285, an automatic mechanical movement with GMT functionality, date display and an approximately 70-hour power reserve. It includes Rolex technologies such as the Chronergy escapement and blue Parachrom hairspring.

Is the GMT-Master II suitable for everyday wear?

Yes. Its Oystersteel case, robust automatic movement, secure screw-down crown and durable Cerachrom bezel make it well suited to regular wear. As with any mechanical watch, it should be protected from severe impacts and maintained appropriately.

How does the GMT function work?

The red or coloured 24-hour hand indicates a second time zone against the graduated bezel. The independently adjustable local-hour hand can be moved when travelling, allowing home time and local time to remain visible without stopping the movement.

What is the price of this pre-owned Rolex GMT-Master II?

This example is listed at £13,950.00. The price applies to the individual watch offered and should be considered alongside its condition, accessories, documentation and any available service information.