Silverstone Time Zone Gulf Silver has one main characteristic that differentiates it from other Graham watches – it is much smaller. Still, the timepiece comes with all of the features and complications typical for Graham. Its calibre is G1714, automatic. The watch performs 28 800 vibrations per hour. It comes with Incabloc shock absorber, 21 jewels and 42-hour power reserve. The functions include GMT/Second time zone and a date window located at the7 o’clock mark. Hands mark hours, minutes and seconds. Domed anti-reflective sapphire crystal glass makes the surface scratch-resistant.