Seiko Prospex Speedtimer Solar

A chronograph works as a stopwatch, using pushers to start, stop, and reset a separate timing display. On this Speedtimer Solar, a subdial tracks elapsed seconds while the main hands continue showing the time.

The watch is described with a bidirectional rotating bezel that can be aligned with a starting mark to track elapsed time at a glance. It is a reference aid, while the chronograph provides the measured stopwatch function.

The catalog description gives approximately three months of battery life when the watch is fully charged. Actual running time depends on the reference and charging conditions, so the exact specification should be checked for the model number.

No. Its chronograph and elapsed-seconds subdial suit sports timing, but solar charging and an everyday watch layout also make it practical for daily wear. The Prospex name places it in Seiko's sport-oriented line.