Rolex GMT-Master II, blue-and-black 24-hour bezel
Model reference: 126710BLNR · 40 mm · Black dialBlack dial and a two-colour 24-hour bezel, with an arrow-tipped hand that reads a second time zone around the scale.
Series
The GMT-Master II is the travel line: a two-colour bezel graduated in twenty-four hours, a fourth hand shaped as an arrow that takes a full day to circle the dial, and a date under a magnifying lens. In this collection the series is represented by one 40 mm silver-tone configuration with a black dial and a blue-and-black bezel. The bracelet and the clasp fitted to an individual watch are confirmed in the conversation.
In this collection
Black dial and a two-colour 24-hour bezel, with an arrow-tipped hand that reads a second time zone around the scale.
This collection lists a small number of configurations. Series not shown here can still be discussed — send the model and reference and availability is checked for you.
Design notes
The dial keeps a twelve-hour scale for everyday reading: a triangle at twelve, applied markers around the ring and a date at three. The bezel carries a twenty-four-hour scale for the arrow-tipped hand, graduated around the outside of the case rather than printed on the dial. The two coexist because they answer different questions — one gives the time where you are, the other the hour somewhere else — and each is read against a different hand. A reading is taken from the graduation the pointer is passing, which is why the scale has to stay legible from wherever the watch is held.
The bezel is the part that changes between the designs here. The Submariner’s bezel is divided across sixty minutes and is read against the minute hand; the Daytona’s is a fixed printed rate table read against the chronograph hand; this one is divided into hours of the day and is read against the arrow-tipped hand. The case, the dial language and the bracelet stay familiar across all of them, so the choice usually comes down to which scale you would actually use. Model reference and case size are listed on the watch page; availability, the bracelet fitted to a particular watch, price and shipping are confirmed in the WhatsApp conversation.
These notes describe the design as it appears in the photographs on this site. Movement, water resistance, weight and material composition are not stated here, because those belong to the specific unit being offered and are confirmed in the conversation before anything is paid.
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