The Prospex Speedtimer Solar Chronograph SSC913 is the perfect combination of vintage style and modern technology. The design of this watch is inspired by Seiko's 1969 Speedtimer, which was one of the world's first automatic chronographs. The watch is powered by light energy, so you never have to worry about changing batteries. Once fully charged, the watch has a 6-month power reserve. The chronograph function allows you to measure up to 60 minutes of elapsed time in 1/5-second increments…