The Prospex Speedtimer Solar Chronographs.
Three solar-powered chronographs with a shared heritage in design.
The 1969 introduction of the Seiko Speedtimer was an important milestone in the history of the chronograph. It was one of the world’s first automatic chronographs and featured Caliber 6139, whose precision in elapsed time measurement signified a real advance in the history of the automatic wristwatch.
Today, the newest generation of Speedtimer chronographs welcomes a series of three new creations whose design embodies the spirit of the original series but offer the added convenience, reliability and accuracy of Seiko’s solar technology.
The hour and minute hands and all twelve indexes are coated with Lumibrite
so that the time of day can be read even in low light conditions.
The aluminum bezels are all in two tones,
with tachymeter indications.
The seconds markers are located on the inner bezel ring
so that the indexes can be large and highly visible.
These three solar chronographs offer the superior specifications of the Prospex Speedtimer to all who want the precision of electronic timekeeping and the reliability and convenience of a watch that is powered exclusively by light.