Horologically speaking, the GMT function was first developed to meet with both the needs and specifications of aviators and especially pilots.

 The GMT function was first developed to meet with both the needs and specifications of aviators and especially pilots. 

This complication has since been popularized and is nowadays commonly used by travelers.The new BR 03-93 GMT timepiece provides the time in three different locations around the world.

How does it work? The GMT hand now stands out with its large red triangle which is perfectly visible both day and night. Spinning around the dial in 24 hours, this fourth hand displays a second time zone (or the local time on a 24-hour scale). For the first time, the iconic square shape is completed with a bi-directional bezel. The BR 03 case was specifically modified to welcome this new functional bezel. It enables the reading of the second time zone, but it can also show a third time zone. Rotating it clockwise subtracts hours and anti-clockwise adds hours.