Lucien Piccard Men&#39;s 26504CH Automatic Diamond Dial Watch Quality Automatic movement; Functions without a battery; Powers automatically with the movement of your arm Scratch-resistant-sapphire crystal Case diameter: 36 mm Gold-tone-stainless-steel case; Champagne dial Water resistant to 99 feet (30 M): withstands rain and splashes of water, but not showering or submersion