It is a 1/100 Prospex Speedtimer Solar Chronographs watch.
second that stands out for its precision and readability. They are equipped
with the new solar chronograph caliber 8A50, which measures time
elapsed in increments of 1/100 of a second. Count every 1/100 of
seconds on the 2 o'clock subdial, every 1/10 second on the subdial
10 o'clock and every second on the 12 o'clock subdial. When using the
stopwatch function, the time of day dial becomes a
60-minute counter, with the hour hand hidden beneath the
minute hand. This comes with a Seiko Official box and a 2 year international warranty. 

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