The navy gmt timepiece by hamilton comes with various functionalities that the active man will benefit from the timepiece is equipped with swiss made eta 2893 1 automatic calibre that performs 28 800 vibrations per hour and has 21 bearing jewels a gmt scale located at the 9 oclock mark provides information about the second time zone the display appearing at 3 oclock features the date the interior rotating bezel that measures elapsed time is another unique characteristic a city display is