Seiko Prospex Samurai Mens Stainless Steel Band Black Dial Automatic Watch - SRPB51. PROSPEX SERIES: In 1964 Seiko announced itself on the world stage of sports timing technology with a whole new generation of timing and scoring devices that set a new standard. The multi-sport suite of timing scoring and display systems comprised no fewer than 1 278 devices in all. Ever since the challenge of sports has inspired Seiko to create new technologies to serve the needs of true sports enthusiasts worldwide. 23 Jewels black Dial Unidirectional Rotating Bezel Screw Down Crown Three (3) Year Limited ManufacturerÕs Warranty Water resistant depth: 200 Meters