SRQ039 6N43 with mirror finish for added

with mirror finish for added brilliance

features a date calendar and LumiBrite hands and markers

tri-fold push button release clasp with secure lock and extender

with screwdown crown

SRQ039 6N43 with mirror finish for addedProspex Speedtimer Mechanical Chronograph. Designed for those who treat life as the ultimate adventure, the Seiko Prospex line meets every challenge with technological excellence and style. Celebrating Seiko's first precision chronographs, developed for international sporting competitions in 1964, as well as its 1969 introduction of the world's first automatic chronograph, this exceptional watch provides chronograph measurement of up to 30 minutes of