Certina DS 2 Black Dial Mens Quartz Watch C024.447.16.051.01 Sapphire crystal - the triumph of modern science - most scratch resistant material on the market Quartz movement with analog display and sapphire crystal dial window Date calendar, water-resistant, chronograph Black leather stainless steel case with black dial Water resistant to 10 ATM / 100 meters / 330 feet : suitable for snorkeling as well as swimming but not diving