First released in 1982, the Rolex GMT Master II is the watch for stylish globetrotters around the world. An evolution of the original GMT-Master, designed for Pan-AM pilots on transatlantic flights, the GMT Master II uses a simple mechanism to tell the time in different locations simultaneously. The GMT Master II is best known for its striking two-tone rotating bezel that allows the wearer to easily track an additional time zone via the additional 24-hour hand. A staple in the Rolex collection for more than half a century, the GMT Master II's design has evolved significantly from its predecessor to become more reliable and durable than ever before. The modern references all feature scratch- and fade-resistant Cerachrom bezels and independent hour hands that make time zone tracking even easier. The bright colors of the GMT Master's bezel insert have always made it stand out from the others in the Rolex collection and have also led to some interesting nicknames given to it by collectors. The blue and black bezel is known as the "Batman", the red and blue the "Pepsi", the red and black is the "Coke" and the brown and gold bezel is known as the "Root Beer". All GMT Master watches, regardless of reference, can display the time in two locations via the combination of the GMT hand and the 24-hour scale. For example, if the wearer is in Paris but wants to know what time it is in New York, he must turn the bezel 6 clicks counterclockwise, as the time zone difference between the two cities is minus 6 hours. Once this is done, the wearer can read the local time with the regular hour hand against the hour markers and New York time with the GMT hand against the 24-hour scale on the bezel. For added convenience, the bezel is split into two colors to display day and night hours.