18ct white gold Rolex Oyster Perpetual Cosmograph Daytona. Model Ref 116509. White gold polished case with matte shoulders water resistant to 100m / 330ft. Automatic chronometer chronograph movement, Rolex caliber 4130 power reserve 72 hours. Black dial with applied Arabic numeral hour markers and outer track minute markers. Screw down winding crown and push pieces. 18ct white gold polished and matte Oyster lock bracelet.