The tissot seastar 1000 is the ultimate watersport watch, with its high water-resistance up to a pressure of 300 meters, screw-down crown and caseback as well as its unidirectional steel bezel with aluminum ring and highly luminescent material for an excellent readability in the dark. Graded blue-black dial with three sub-dials, legible markers, and super-luminovaâ® 45. 5mm stainless steel case with black aluminum bezel ring scratch-resistant sapphire crystal with double-sided antireflective coating swiss quartz movement interchangeable quick release stainless steel link bracelet; folding clasp with safety and diver extension screw down crown and water-resistance up to 300 meters we are an authorized tissot dealer