Prospex Automatic Diver's Watch. Designed for those who treat life as the ultimate adventure, the Seiko Prospex line meets every challenge with technological excellence and style. Part of a rich legacy of innovation in high-intensity timekeeping, Prospex continues to celebrate a long history of sports watch excellence with re-creations and re-interpretations of landmark achievements. With the thinnest case to date of any Seiko automatic diver's watch, as well as an elegant, yet sporty five-row bracelet, this sleekly updated timepiece incorporates the distinctive cushion-shape and recessed crown of one of Seiko's most iconic designs. Crafted of stainless steel with super hard coating, this versatile watch includes a curved sapphire crystal with anti-reflective coating on the inner surface, black uni-directional rotating elapsed timing bezel, screwdown crown and caseback, and a newly developed compact tri-fold clasp with secure lock and extender. The clean white dial features a date calendar and LumiBrite hands and markers. Following ISO standards for scuba diving to depths of up to 200 meters, this exceptional timepiece offers manual winding capability and includes a 24-jewel automatic movement with a frequency of 21,600 vibrations per hour and a power reserve of approximately 70 hours. 200m Water Resistant