SSC923P1 Seiko Prospex Speedtimer Chrono Solar 41 Night Vision 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 seconds hand, a 60-minute chronograph in a subdial at six o'clock, and a power reserve function. Black Series, a "night vision" concept. This solar chronograph inherits the iconic designs and styles of the Speedtimer series of the 1960s and 1970s. All watches are powered by Seiko's solar caliber V192. This model features a durable and bright Lumibrite Pro Green on the hands as well as the indices. SSC923P1 Seiko Prospex Speedtimer Chrono Solar 41 Night Vision 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 seconds hand, a 60-minute chronograph in a subdial at six o'clock, and a power reserve function. Black Series, a "night vision" concept. This solar chronograph inherits the iconic designs and styles of the Speedtimer series of the 1960s and 1970s. All watches are powered by Seiko's solar caliber V192. This model features a durable and bright Lumibrite Pro Green on the hands as well as the indices.