Luminox Watch Pacific Diver Mens XS.3121. The Pacific Diver series features a 44 mm stainless steel case with a CARBONOX uni directional bezel, resulting in an eye catching fusion of materials. Model 3121 sports a black dial and black bezel on a genuine rubber strap and features water resistance to 200 meters, screw in crown and case back, sapphire crystal and, of course, the Luminox Light Technology, which guarantees constant night visibility for up to 25 years. The Luminox Pacific Diver 3120 Series is the perfect casual watch capable of going anywhere anytime. It fits in at home, at the office, in the gym, and yes, in the Pacific Ocean.