Definition
GMT stands for Greenwich Mean Time. In the world of horology, a GMT watch is one that displays two or more time zones at the same time. This is typically achieved through an additional hand, and sometimes, with a rotating bezel, allowing the user to keep track of time across different time zones.
Origin
The concept of GMT was established in 1884 when Greenwich, London, was designated as the prime meridian. GMT watches gained popularity in the 1950s, notably amongst pilots and frequent travelers, as intercontinental air travel became more common.
Usage
GMT watches are popular among travelers, pilots, business professionals, and anyone who needs to keep track of time in more than one timezone. They are particularly helpful in a globalized context, where communication and coordination across different time zones are commonplace.
Examples
The Rolex GMT-Master is one of the most iconic examples of a GMT watch, originally developed for Pan Am pilots.
The Omega Seamaster Planet Ocean GMT is also a popular example, offering GMT functionality in a dive watch.
Synonyms
Although “GMT” is the most common term, phrases such as “dual timezone watch” or “multi-timezone watch” are also used to describe this feature.
Related Terms
- “Timezone”: the different time zones around the world.
- “Rotating Bezel”: a bezel that can be rotated to help indicate a second time zone.
Tips
When adjusting a GMT watch, it’s important to know the current GMT time to correctly set the additional hand or bezel.
GMT watches are particularly valuable for frequent travelers as they ease the adaptation to new time zones.
Trivia
The creation of the GMT watch was directly influenced by the expansion of commercial aviation, reflecting the need for timekeeping tools that are both precise and versatile for travelers and professionals.
The popularity of GMT watches in pop culture, especially in spy and adventure movies, reflects their status as symbols of sophistication and global connectivity.