Seiko Prospex Automatic Diver Mens Watch SRPL13 Prospex Automatic Diver. Designed for those who treat life as the ultimate adventure, the Seiko Prospex line meets every challenge with technological excellence and winning design. Inspired by Seiko?s most iconic diving styles, the case retains the straight contour of the original design with a sharpness enhanced by a sleeker more compact profile. For reliable timing in rough waters, the 23-jewel automatic movement beats at a frequency of 21,600 vibrations per hour, with a power reserve of approximately 41 hours, and can be wound manually or automatically. Framed by a black uni-directional rotating elapsed timing bezel, the black dial features a date calendar and LumiBrite hands and markers. Crafted of stainless steel, this high-intensity timepiece follows ISO standards for scuba diving and is equipped with a secure screwdown crown and caseback and a tri-fold push button release clasp with secure lock and extender. 200m Water ResistantCase: Stainless steel caseCase Diameter: 41.7mmCase Thickness: 12.3mmCase Length: 49,5mmCrystal: Hardlex crystalWater Resistance: 200 meters (660 feet), follows ISO standards and is suitable for scuba divingDial Color: BlackStrap: Stainless steel braceletLug Width: 20mmMovement:AutomaticCaliber 4R3521,600 vibrations per hour23 jewelsPower reserve: approximately 41 hours Prospex Automatic Diver. Designed for those who treat life as the ultimate adventure, the Seiko Prospex line meets every challenge with technological excellence and winning design. Inspired by Seiko?s most iconic diving styles, the case retains the straight contour of the original design with a sharpness enhanced by a sleeker more compact profile. For reliable timing in rough waters, the 23-jewel automatic movement beats at a frequency of 21,600 vibrations per hour, with a power reserve of approximately 41 hours, and can be wound manually or automatically. Framed by a black uni-directional rotating elapsed timing bezel, the black dial features a date calendar and LumiBrite hands and markers. Crafted of stainless steel, this high-intensity timepiece follows ISO standards for scuba diving and is equipped with a secure screwdown crown and caseback and a tri-fold push button release clasp with secure lock and extender. 200m Water Resistant Case: Stainless steel case Case Diameter: 41.7mm Case Thickness: 12.3mm Case Length: 49,5mm Crystal: Hardlex crystal Water Resistance: 200 meters (660 feet), follows ISO standards and is suitable for scuba diving Dial Color: Black Strap: Stainless steel bracelet Lug Width: 20mm Movement: Automatic Caliber 4R35 21,600 vibrations per hour 23 jewels Power reserve: approximately 41 hours integration by