Certina DS-1 Powermatic 80 Automatic Mens Watch C029.807.16.031.01 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 Brown leather strap and stainless steel case with silver-tone dial Water resistant to 10 ATM / 100 meters / 330 feet : suitable for snorkeling as well as swimming but not diving