Grahams silverstone watches are greatly inspired by racing and carry the name of the famous circuit the time zone gulf blue timepiece comes with automatic self winding g1714 movement it performs 28 800 vibrations per hour additional features include incabloc shock absorber 21 jewels and 42 hour power reserve it has a number of prominent complications among which gmtsecond time zone and a date window located at the 7 oclock mark hands mark hours minutes and seconds