Prospex Speedtimer Solar Chronograph. Design inspired by Seiko's 1969 Speedtimer, one of the world's first automatic chronographs. Chronograph measures up to 60 minutes of elapsed time in 1/5-second increments with split time measurement function.
- Gray dial
- Date calendar
- 24-subdial
- Vivid green LumiBrite hands and markers
- Dual-tone black and gray tachymeter bezel
- Screwdown caseback
- Tri-fold push button release clasp
