Tissot Seastar 2000 Professional Powermatic 80 The darker sibling featuring a graded blue-black dial. Same ISO 6425 professional diving credentials with 600m water resistance. Key Features ISO 6425 certified Powermatic 80.111 - 80hr power reserve 46mm stainless steel case Graded blue-black dial Ceramic bezel Helium escape valve See-through caseback 600m water resistance Specifications Reference T120.607.11.041.01 Movement Automatic - Powermatic 80.111 Power Reserve 80 hours Case 46mm 316L Stainless Steel Dial Graded Blue-Black Water Resistance 600m / 2000ft