Prospex 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 part of a high-intensity collection inspired by the 1969 “Speedtimer,” the world’s first self-winding chronograph. Paying tribute to the iconic original with its black aluminium tachymeter bezel and seconds markers positioned on the dial ring for a cleaner and clearer dial, this exceptional timepiece offers an enhanced emphasis on usability, legibility and visibility by adding LumiBrite hands and markers, a slightly larger case size and a tapered three-link bracelet.