SPB105Prospex Automatic Diver. Designed for those who treat life as the ultimate adventure, the Seiko Prospex line follows every challenge with technological excellence and style. A modern reimagining of Seiko's landmark 1968 Diver's Watch, this dynamic design features a stainless steel case and bracelet with super hard coating for nearly doubled hardness. Framed by a black one way rotating elapsed timing bezel, the deep green sunray finish dial features