Hamilton watch american classic jazzmaster traveller gmt hamiltons jazzmaster traveler gmt watch brags stylish design and various useful complications the watch is equipped with swiss made eta 2893 2 automatic calibre that performs 28 800 vibrations per hour and has 21 bearing jewels a date display is positioned at the 3 oclock mark the availability of a second time zone comes as one of the most prominent watch characteristics hands are luminous for improved night time visibility addition