Presenting the Seiko Prospex SPEEDTIMER Silver Dial Watch, inspired by the iconic Speed timer and Seiko's esteemed legacy in sports timing. In the 1960s, Seiko's high-precision equipment gained recognition from esteemed sports federations, with their revolutionary "heart-shaped cam" mechanism transforming manual sports timing. Their pioneering Seiko Speed timer with Caliber 6139, introduced in 1969, became the world's first automatic chronograph with a column wheel and vertical clutch, setting new standards for wristwatch elapsed time measurement. Today, the Prospex collection proudly introduces a new series of SPEEDTIMER watches, including this remarkable piece from the solar chronographs range.