SSC917P1 Seiko Prospex Speedtimer Chrono Solar 39 Watch, Caliber V192. Automatic Chronograph, with calendar. Solar chronographs inspired by the 1969 Speedtimer, the world's first automatic chronograph watch equipped with a vertical clutch and column wheel. The new Speedtimer is powered by Solar Caliber V192, offers a 24-hour indicator, a time-of-day second hand, a 60-minute chronograph on a subdial at 6 o'clock, and a power reserve function. They are offered in four different gold and black dial colors and will join the Prospex core collection. This solar chronograph watch belongs to the Prospex Speedtimer watch collection that represents Seiko's legacy of professional timekeeping. SSC917P1 Seiko Prospex Speedtimer Chrono Solar 39 Watch, Caliber V192. Automatic Chronograph, with calendar. Solar chronographs inspired by the 1969 Speedtimer, the world's first automatic chronograph watch equipped with a vertical clutch and column wheel. The new Speedtimer is powered by Solar Caliber V192, offers a 24-hour indicator, a time-of-day second hand, a 60-minute chronograph on a subdial at 6 o'clock, and a power reserve function. They are offered in four different gold and black dial colors and will join the Prospex core collection. This solar chronograph watch belongs to the Prospex Speedtimer watch collection that represents Seiko's legacy of professional timekeeping.