All models pay homage to their great predecessors by adopting the same white dial and red accent at 12 o'clock that were used in the Laurel watch which is the origin of Seiko watchmaking that continues to this day. It also expresses our commitment to continue manufacturing watches that are close to people and keep time together. In addition the leather band uses LWG certified tanned leather. It embodies Seiko's desire to reduce the environmental impact of manufacturing. As a common specification the white dial red color and attached set band are made of leather produced by LWG-certified tanners. *Leather Working Group (LWG): NPO that contributes to the development of sustainable leather production At the time Laurel did not have Lumibrite but Prospex maintains full functionality by adopting vintage-style Lumi. At the same time it expresses the world feeling of this theme. Solar chronograph 1/100 second measurement model A new design for SPEEDTIMER born from the pursuit of the essence of measurement function as a chronograph with the most precise measurement system.