Cartier Men's W20090X8 Santos 100 XL Automatic Chronograph Watch Swiss Made watch with Cartier Calibre 8630 Swiss-automatic movement; Functions without a battery; Powers automatically with the movement of your arms Scratch-resistant-sapphire crystal; Case diameter: 42 mm Solid square stainless steel case with genuine black alligator leather strap Roman numeral silvered opaline-white dial; Luminous black-outlined sword-shaped hands; Stationary stainless steel bezel studded with eight screw accents; Chronograph functions with 12-hour, 30-minute, and 60-second subdials Water resistant to 330 feet (100 M): suitable for snorkeling, as well as swimming, but not diving