The Rolex GMT-Master was created in the 1950s for Pan Am pilots, it featured a 24-hour hand and rotating bezel. Its iconic "Pepsi" bezel with red and blue colors became synonymous with the model.
In 1983, the GMT-Master II improved upon the original, enabling independent adjustment of the hour hand for effortless time zone changes, and introducing the new ceramic bezel for the GMT line. The GMT-Master's enduring popularity stems from its precision, functionality, and design.
In the GMT complication, the rotating bezel is used to adjust the second time zone tracking function. By rotating the bezel, the reference mark can be aligned with the time on the bezel scale, indicating the time difference from the local time.
With new iterations, the GMT-Master continues to evolve, incorporating advancements while staying true to its heritage as a celebrated timepiece loved for its elegance and practicality.