Graham Silverstone RS GMT. Limited Edition of 250. 46 mm steel case. Black smoked dial shows hours, minutes, seconds, chronograph, GMT and date. Scratch resistant sapphire. Automatic chronograph, G1721 caliber, 28 jewels, working at 28,800 VpH with standard 48 hours power reserve. Beige quilted calfskin leather strap. Steel folding buckle. Water resistance 330 feet/100 m.