Ever since its first diver's watch in 1965, Seiko has developed new technologies, features and designs that have made the Seiko Prospex diver's watch collection a favorite among professional and recreational divers the world over. Through more than a half-century of innovation, Seiko has continuously pushed back the boundaries of where sports watches, and diver's watches in particular, can go and how they can be used. 

• Case: 42mm Stainless Steel
• Bracelet: Stainless Steel
• Buckle: Three-fold clasp with secure lock , push button release with extender
• Dial Color: Blue
• Movement: Automatic with manual winding capacity
• Power reserve: Approx. 72 hours
• Sapphire Crystal
• LumiBrite on hands, index(es), and bezel
• Water resistance: 200 m
• Style#: SPB187