Powering the GMT-equipped Whale Shark is the Oris caliber 798, which is based on the Sellita 330-1. Automatically wound and offering 42 hours of power reserve and a rate of 4 Hz, the 798 features an independently adjustable 24-hour hand that can be used in conjunction with the 24-hour scale and complementary bezel to track additional time zones. The caseback is steel, the crystal is sapphire, the water resistance is 300 meters, and the Whale Shark Edition comes only on a full steel bracelet.