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 one of the first Speedtimer models, nicknamed by Seiko fans after a famous astronaut who wore the iconic original into space, this bold timepiece showcases a two-tone red and blue aluminum tachymeter bezel and a vibrant yellow dial with contrasting subdials. In a brilliant sunray finish, the dial also includes a 24-hour display, power reserve indicator, date calendar, and LumiBrite hands and markers. 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. Crafted of stainless steel, with a curved anti-reflective sapphire crystal and tapered three-link bracelet, this exceptional creation offers a secure screwdown caseback and a tri-fold push button release clasp. 10 bar, 100M Water Resistant