Luminox Watch Pacific Diver Mens XS.3121.BO. 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.BO is a black on black (blacked out dial, black bezel and black case) eye catcher coming with a genuine rubber strap and featuring 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 motto, Every Second Counts is engraved on the stainless steel case back, to remind you to make the most of every moment you have.