Seiko Prospex Speedtimer SRQ055 signature W stitching both made from a bio-based

both made from a bio-based resin thought to lessen environmental impact

polished gold-tone Roman numerals

whose job demands intuitive reading of time

minimum heart rate

auto cumulative ascent and descent of particular treks)

Seiko Prospex Speedtimer SRQ055 signature W stitching both made from a bio-basedProspex Speedtimer Mechanical Chronograph. Seiko Prospex challenges every limit with timepieces created to exceed expectations, engineered with superior style and innovative technology for the sea, sky or land. Driven by a heritage of iconic design, Prospex continues to keep going forward with excellence in precision timekeeping, crafted for the modern world. Based on Seikos Speedtimer chronographs of the early 1970s, this powerful creation offers