Glossary

A GMT watch is a timepiece designed to display multiple time zones simultaneously, typically focusing on a primary local time and a secondary reference time. Its defining feature is an additional hand, often brightly colored for visibility, that indicates the time in a second time zone. 

Additionally, it comes with a 24-hour bezel or scale, which allows users to easily differentiate between day and night in the reference time. In some models, the bezel can be rotated to track a third time zone, making GMT watches a versatile and practical choice for frequent travelers.