Seiko Mens PROSPEX Marinemaster Professional Diver Watch, SBBN031

PROSPEX MARINEMASTER SERIES: Introducing the Prospex Master Series: Marinemaster Professional Dive Watches. Serious watches for serious sports. From the first diverÕs watch released in 1965, Seiko has been exceeding expectations for divers with its innovative technology. The Seiko diver is a timepiece that guides you through the challenges in the deep blue. An authentic watch, trusted by experts.