Prospex Speedtimer Solar Chronograph

Design inspired by Seiko's first precision chronographs, developed for international sporting competitions in 1964

Chronograph measures up to 60 minutes of elapsed time in 1/5-second increments with split time measurement function

White dial with sand-blasted texture and black subdials

Date calendar

24-hour subdial

Beige LumiBrite hands and markers

Black tachymeter bezel

Screwdown caseback

Tri-fold push button release clasp