Seiko Prospex 140th Anniversary Limited Editions Based on the 1968 Diver's 300-meter water resistant watch, this model has been given a modern design interpretation. While retaining the sharp and powerful design of the original, the new model features a slimmer bezel and a contemporary design for its minute and hour hands. Limited edition 1 of 5000 Caliber 6R35 Waterproof up to 200m