Hamilton Jazzmaster Auto Chrono Men's Automatic Watch H32606185 Self-winding automatic movement - an Eco-friendly choice for discerning customer. Powered by everyday movement of your arm Automatic self-winding movement with analog display and sapphire crystal dial window Date calendar water-resistant, luminous, chronograph Silver-tone metal stainless steel case with grey dial Water resistant to 10 ATM / 100 meters / 330 feet : suitable for snorkeling as well as swimming but not diving