Diesel Men's Ironside Quartz Stainless Steel Casual Watch (Model: DZ4391) Round watch in black stainless steel with guilloche dial featuring center bar with two chronograph functions 48 mm stainless steel case with mineral dial window Quartz movement with analog display Silicone band with buckle closure Water resistant to 50 m (165 ft): In general, suitable for short periods of recreational swimming, but not diving or snorkeling