World-timers, by contrast, indicate local time in key cities throughout the globe with a rotating ring or by using subdials. Such capabilities are particularly valuable for businessmen, pilots, and more-frequent travelers across the globe. Out of functionality, though, time zone exhibit wristwatches signify interdependence in this world and new-age practicality.
Time Zones
Time zones are regions of the Earth that have different local times due to their longitude relative to Greenwich Mean Time (GMT). Watches having functions like GMT or world-timers enable someone to know the time in more than one zone. GMT watches have a second hour hand or a rotating 24-hour bezel, allowing the owner to monitor two time zones.
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