Chase-Durer Men's 777.8BB Conquest Automatic COSC 18K Rose Gold-Plated Watch Quality Swiss Automatic movement; functions without a battery; powers automatically with the movement of your arm Scratch-resistant sapphire crystal with anti-reflective coating Solid 316L stainless steel case with 10-micron 18kt rose-gold plated overlay; titanium bezel; screw-down case back with exhibition window; Rubber bracelet with solid rose-gold plated steel inserts Super-Luminova coated luminous hands; date function at six o'clock Water resistant to 330 feet (100 M): suitable for snorkeling, as well as swimming, but not diving