A GMT-Master II bezel is easy to choose badly if every conversation begins with demand. The colour you repeatedly enjoy seeing is more useful than a prediction about which nickname will command attention next year. Blue and black provides a good starting point: recognisable colour, a black dial and a travel function that deserves its own evaluation.
This guide uses the Jubilee-equipped 126710BLNR-0002. It does not rank colours by investment potential. Instead, it separates the appearance, the bracelet and the way you will use the second time zone, so the eventual purchase has a purpose beyond winning an argument about popularity.
The history behind the choice
The GMT-Master arrived in 1955 as long-distance travel was changing the relationship between places and time. Rolex introduced the GMT-Master II in 1982, adding a distinct chapter rather than simply renaming the original. The modern collection still makes its extra time information visible through a 24-hour hand and bezel. Rolex’s historical material also identifies the blue-and-black GMT-Master II in 2013, while its collection history illustrates the later 126710BLNR generation in 2019. That progression is a reason to check references carefully. A familiar colour combination can span different watches and bracelet arrangements. The nickname may remain convenient, but it is less precise than the full configuration when you are deciding what to buy.
The exact reference
| Specification | Published detail |
|---|---|
| Reference | 126710BLNR-0002 |
| Case | 40mm Oystersteel |
| Dial / bezel | Black / blue-and-black Cerachrom |
| Bezel operation | Bidirectional, 24-hour scale |
| Movement | Automatic calibre 3285 |
| Functions | Date; independently adjustable local hour; 24-hour hand |
| Stated reserve | Approximately 70 hours |
| Water resistance | 100m |
| Crystal | Sapphire with Cyclops |
| Bracelet / clasp | Jubilee / Oysterlock with 5mm Easylink |
The additional hand needs a distinct job
The conventional hour hand shows local time, while the additional twenty-four-hour hand reads against the bezel. Independent local-hour adjustment allows the main display to change when travelling without rebuilding the reference-time indication. That is the useful mechanical distinction behind the GMT-Master II name.
A second zone can also represent an overseas colleague or family member. The complication is therefore relevant beyond airports, although the separately adjustable local hour is especially convenient when the watch itself travels. This is a stronger reason to choose it than a vague association between colourful bezels and adventure. Decide which two times you want available, then assess whether the display makes that relationship clear to you.
Blue and black are part of a twenty-four-hour scale
The bezel divides the day into two coloured halves. Blue and black make that division less overtly contrasting than some other GMT combinations while retaining a clear break around the ring. It is colour doing a job within the display, as well as providing the reference’s most recognisable visual feature.
The Cerachrom insert surrounds a black dial, so the blue section becomes the principal colour accent. The Jubilee adds a finer reflective pattern beneath it. Together they make this configuration more intricate than a black-bezel sports watch on a broad three-link bracelet. Choose the colour because you enjoy that complete arrangement. A familiar nickname describes only part of the watch and says nothing useful about whether its palette will remain appealing to you.
A nickname does not define a configuration
The full reference used here specifies the Jubilee arrangement. Before comparing offers, establish the dial, metals, bracelet and exact reference of each watch. A familiar colour nickname can conceal differences that matter to the purchase, including whether you are considering the same generation.
The Jubilee’s finer link pattern also changes the impression of the blue-and-black bezel. Inspect the bracelet as part of the complete design. If you prefer a different bracelet, obtain an exact quotation and compatibility confirmation before assuming you can change it later. Buying the available configuration while mentally replacing half of it can turn an apparently straightforward decision into a more complicated one.
The rotating scale is a travel feature
The bidirectional bezel can reposition the twenty-four-hour scale relative to the additional hand. That gives the GMT-Master II flexibility which a fixed GMT bezel lacks. It also explains why its bezel should not be assessed as though it were the Submariner’s unidirectional elapsed-time scale: the two displays are designed to answer different questions.
Calibre 3285 supports the travel arrangement with automatic winding and approximately seventy hours of reserve. The movement, extra hand and rotating ring form a connected system. If short-interval timing is your priority, the Submariner may be more relevant. If you want local and reference time together, the GMT’s extra information has a clear purpose, and bezel colour becomes the final design choice rather than the whole purchase argument.
Choose a watch, not a forecast
If two colours appeal, make a short list of what actually differs in the examples available to you: appearance, condition, configuration, quoted cost and the seller’s terms. Keep a future selling price out of the calculation unless you are prepared for that assumption to be wrong. This guide offers no forecast of relative returns.
Choose the BLNR when the blue-and-black combination fits your taste and you value its separate time display. Consider another GMT colour when the same function appeals but the palette does not. Consider a simpler watch when the extra information only crowds the dial for you. The best reason to own this reference is that its particular mixture of colour and utility makes sense in your life, even when nobody recognises its nickname.
Specifications and sources checked on 8 September 2026. Rolex BLNR specifications; Rolex GMT-Master origins; Rolex historical GMT references; Submariner alternative.
Image: AI-generated editorial illustration of the Rolex GMT-Master II 126710BLNR-0002 on Jubilee bracelet. Fine dial details and finishing may differ from the production watch.


