Seiko Speedtimer Solar Chronograph. Designed for those who treat life as the ultimate adventure, Seiko Prospex keeps moving forward, meeting every challenge with technological excellence and winning design. This rugged and stylish watch is a part of a high-intensity collection inspired by classic motorsports in the 1970s, when Seiko’s original 1969 “Speedtimer,” the world’s first self-winding chronograph, was at its prime. Reflecting the theme of grand touring cars, the clean-cut navy blue tachymeter bezel and gray dial with sunray finish express the world of driving through its bold colors, reminiscent of muscle cars racing down endless highways. 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. The gray dial features three black subdials with a 24-hour indicator and power reserve indicator, as well as a date calendar and LumiBrite hands and markers. Crafted of stainless steel, this sporty model includes a curved anti-reflective sapphire crystal, secure screwdown caseback and tri-fold push button release clasp. 10 bar, 100M Water Resistant.