Grand seiko watch mechanical each grand seiko timepiece is assembled carefully by hand sbgr059 comes with unique mechanical automatic calibre this means that the watch has hand winding option the calibre is 9s65 it performs 28 800 vibrations per hour and has 35 bearing jewels a 72 hour power reserve is available the dial features a date window positioned conveniently at the 3 o clock mark this timepiece is protected from water penetration and magnetic influences the casing and bracelet