Taking it up a notch with the newest addition to the Series 8 Collection. The 831 model has the same eye-catching octagonal case as the 830 model, but with a simpler monotone dial. The stylish hands taper off toward the outer edge of the dial, and the detailed index markers provide a dynamic look. The bold hairline finish of the bracelet with its clean, straight lines, combines beautifully with the simple design of the case. Other features include Sapphire glass with anti-reflective coating, 42-hour power reserve once fully wound and Antimagnetic 16,000 a/m.