18kt yellow gold case. Black hand-sewn full grain alligator strap. Guilloche silvered dial with central rose motif. 18kt yellow gold octagonal crown set with a faceted sapphire. 18kt yellow gold adjustable deployment buckle. Perpetual calendar with two time zones complications. Scratch resistant sapphire crystal. Transparent caseback. Case diameter 25.6mm. Case thickness 4.8mm. Automatic movement. Water resistant at 30 meters (100 feet). Cartier Tortue Perpetual Calendar Two Time Zone 18kt Yellow Gold Mens Watch W1538651 