The history of GMT watches can be traced back to the 1950s when pilots and frequent travelers started to demand watches that could display the time in multiple time zones. Rolex was the first company to produce a GMT watch, the Rolex GMT-Master, in collaboration with Pan American World Airways. The watch was designed to help pilots keep track of two time zones at once, and it quickly became a popular choice among travelers and aviation professionals.
Functionally, GMT watches usually have an additional hour hand that completes one full rotation in 24 hours, which can be set to a different time zone. The hour hand is often accompanied by a 24-hour bezel or an inner ring that can be rotated to show the time in different time zones. Some GMT watches also feature a day/night indicator or a second time zone sub-dial.
In recent years, many luxury watch brands have produced their own GMT watches, often with additional features such as automatic movement, chronograph functions, and high-quality materials. Today, GMT watches are a popular choice for frequent travelers, pilots, and anyone who needs to keep track of multiple time zones.
Overall, the GMT watch is a practical and useful tool for people who need to keep track of time across different time zones. Its history is closely tied to the aviation industry, and it continues to be a popular choice for travelers and professionals around the world.