Graham GMT Oversize Chronofighter Big Date. 47 mm steel case with 18k rose gold, black carbon left hand fast-action start/stop trigger and black rubber reset pusher. 18k rose gold with green sapphire bezel featuring rhodium GMT scale. sapphire crystal case back. Black and green colored dial shows hours, minutes, seconds, chronograph and date. Scratch resistant sapphire. Automatic chronograph, G1733 caliber, working at 28,800 VpH with standard 48 hours power reserve. Black rubber strap. Stainless pin buckle. Water resistance 330 feet/100 m.