Oniss Paris Men's Swiss Automatic Stainless Steel and Ceramic Casual Watch, Color:Black (Model: ON611-MRG BLK) Skeleton automatic Japanese movement 21 jewels High tech ceramic and stainless steel case and dial Exhibition case back Sapphire crystal on the top case and case back Water resistant to 330 feet (100 M): suitable for snorkeling, as well as swimming, but not diving