A History of the Rolex Oyster Perpetual GMT-Master II : From Tool Watch to Icon

A History of the Rolex Oyster Perpetual GMT-Master II : From Tool Watch to Icon Created initially as a tool for the airline pilot, the GMT-Master has evolved over six decades to become a beloved companion on the wrists of globe-trotting cosmopolites. By Jamie Tan The dawn of the Jet Age in the late 1940s kicked off a period of rapid advancements in commercial air travel, effectively shrinking the world like never before Long haul flights that crossed multiple time zones became common, and the pilots making them needed a way to keep track of multiple time zones. Pan American World Airways (also known as "Pan Am") was among the first to identify this need, when it advised its pilots to maintain the circadian rhythms in their respective “home” time zones to combat jet lag An industry-wide practice that was established later is the logging of flight operations according to Greenwich Mean Time, GMT,. Source