Seiko Prospex Speedtimer Solar Chronograph SSC813 21 jewels the dial is framed by

the dial is framed by a black uni-directional rotating elapsed timing bezel

and offers manual winding capability

Screw-in case back

the white sunray finish dial features a day/date calendar

Seiko Prospex Speedtimer Solar Chronograph SSC813 21 jewels the dial is framed byProspex 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. Combining precision timing with wearability and the energy efficiency of solar power, this exceptional watch, inspired by Seikos first precision chronographs, developed for international sporting competitions in 1964, provides chronograph