In 1968, Seiko launched revolutionary new innovation with the worlds first hi-beat Divers watch. With a case design inspired by the original 1968 piece, carrying the nameMarinemasterfrom Seikos heritage in diving watchmaking, this new re-interpretation has the same 300m water resistance. Under a dual-curved sapphire crystal glass is a black dial with a subtle sand-like pattern. Designed for high contrast under water, all aspects are optimised for diving conditions: a streamlined case, with the crown in the comfy 4 oclock position, strong Lumibrite for legibility at the darkest depths and a unidirectional rotating bezel as per ISO Diving standard. Prospex is a combination of the wordsProfessionalandSpecifications.Seiko Prospex timepieces are designed to be practical, reliable and durable; to meet the high standards required in extreme environments for sports lovers and adventure seekers alike. Powered by the automatic movement with 26 jewels and a power reserv