Vestal Men's OBCS001 USS Observer Chrono Black White Lume Watch Left-handed watch featuring luminous hands, two chronograph subdials, and date window at 3 o'clock 46.5 mm stainless steel case with mineral dial window Japanese quartz movement with analog display Silicone band with buckle closure Water resistant to 100 m (330 ft): In general, suitable for swimming and snorkeling, but not scuba diving