Rolex's GMT-Master is a wristwatch popular among international airline pilots, designed to meet the needs of aviators. It features a GMT function that allows pilots to easily track the time in two or three different time zones. The combination of the 24-hour graduated bezel and the 24-hour hand has had a profound impact on wristwatch design and makes it a sought-after choice in the secondary market. The Rolex GMT-Master is a widely appreciated and durable wristwatch with a stable presence in the market, offering abundant supply and consistent value.