Seiko Prospex Speedtimer Solar Chronograph Mens Watch SSC917 Seiko Prospex Speedtimer Solar Chronograph Men Watch SSC917 Prospex Speedtimer Solar ChronographDesign inspired by Seiko's 1969 Speedtimer, one of the world's first automatic chronographsPowered by light energy ? no battery change required6?month power reserve once fully chargedChronograph measures up to 60 minutes of elapsed time in 1/5?second increments with split time measurement functionBlack dialDate calendar24?hour subdialVivid green LumiBrite hands and markersCurved sapphire crystal with anti?reflective coating on the inner surfaceDual?tone black and gray tachymeter bezelScrewdown casebackCase diameter: 41.4mmStainless steel case and bracelet with black hard coatingTri?fold push button release claspWater?resistant to 10 bar, 100 meters (330 feet)Caliber V192 Prospex Speedtimer Solar ChronographDesign inspired by Seiko's 1969 Speedtimer, one of the world's first automatic chronographsPowered by light energy ? no battery change required6?month power reserve once fully chargedChronograph measures up to 60 minutes of elapsed time in 1/5?second increments with split time measurement functionBlack dialDate calendar24?hour subdialVivid green LumiBrite hands and markersCurved sapphire crystal with anti?reflective coating on the inner surfaceDual?tone black and gray tachymeter bezelScrewdown casebackCase diameter: 41.4mmStainless steel case and bracelet with black hard coatingTri?fold push button release claspWater?resistant to 10 bar, 100 meters (330 feet)Caliber V192 Seiko Prospex Speedtimer Solar Chronograph Men Watch SSC917 Prospex Speedtimer Solar ChronographDesign inspired by Seiko's 1969 Speedtimer, one of the world's first automatic chronographsPowered by light energy ? no battery change required6?month power reserve once fully chargedChronograph measures up to 60 minutes of elapsed time in 1/5?second increments with split time measurement functionBlack dialDate calendar24?hour subdialVivid green LumiBrite hands and markersCurved sapphire crystal with anti?reflective coating on the inner surfaceDual?tone black and gray tachymeter bezelScrewdown casebackCase diameter: 41.4mmStainless steel case and bracelet with black hard coatingTri?fold push button release claspWater?resistant to 10 bar, 100 meters (330 feet)Caliber V192 Prospex Speedtimer Solar Chronograph Design inspired by Seiko's 1969 Speedtimer, one of the world's first automatic chronographs Powered by light energy ? no battery change required 6?month power reserve once fully charged Chronograph measures up to 60 minutes of elapsed time in 1/5?second increments with split time measurement function Black dial Date calendar 24?hour subdial Vivid green LumiBrite hands and markers Curved sapphire crystal with anti?reflective coating on the inner surface Dual?tone black and gray tachymeter bezel Screwdown caseback Case diameter: 41.4mm Stainless steel case and bracelet with black hard coating Tri?fold push button release clasp Water?resistant to 10 bar, 100 meters (330 feet) Caliber V192