The Roadmaster Marine GMT features the BALLs GMT quick-set mechanism allowing travelers to easily adjust time zones. Simply by turning and pressing either one of the patented quick-set buttons, the GMT hand can be easily set instead of using the main crown. The button at 8 oclock moves the GMT hand backward, while the 10 oclock button moves it forward. Combined with a bi-directional 24-hour bezel and main hands, the Marine GMT allows for three time zones to be tracked simultaneously. In the darkest conditions, time can be read thanks to the self-powered Hgas tubes carefully mounted onto the dial at each hour marker as well as the main hour hand, minute hand and GMT hand. This cutting-edge Swiss technology consists in encapsulating Hgas in glass micro tubes. These micro tubes dont require recharge from any external light or energy source. The Marine GMT features the chronometer certified automatic caliber BALL RR1203-C with day/date functions. It is water resistant to 300 meters