The Gmt-Master was designed to show the time in two time zones simultaneously. Its distinctive feature is the two-tone bezel that allows you to distinguish the hours of the day from those of the night. The Rolex GMT-Master II is one of the most coveted luxury travel watches on the planet, and its predecessor, the original, non-numerical GMT-Master, basically established the template that other dual-time zone timepieces have been following for more than half a century. Now it is considered one of Rolex's most iconic models thanks to its history and evolution, from its aviation-inspired beginnings in 1954 to the status it enjoys in the modern era, with all the major models spotlighted in between.