Prospex Speedtimer Solar Chronograph U.S. Special Edition. Designed for those who treat life as the ultimate adventure, the Seiko Prospex line meets every challenge with technological excellence and style. With vibrant colors inspired by vintage racing cars, this exciting Special Edition celebrates the 1969 “Speedtimer,” the world’s first self-winding chronograph. The chronograph function measures up to 60 minutes of elapsed time in 1/5-second increments and includes a split time function, while the solar cell, powered by any light source, with no battery change required, provides a 6-month power reserve when fully charged. Framed by a black tachymeter ring, the bright yellow dial features three black subdials, including 24-hour and power reserve indicators, a date calendar, and LumiBrite hands and markers. Crafted of stainless steel with tri-fold push button release clasp, and curved sapphire crystal with anti-reflective coating on the inner surface. 10 bar, 100M Water Resistant