Seiko - Prospex Speedtimer - SFJ001

It is a 1/100 second Prospex Speedtimer Solar Chronograph watch that stands out for its precision and readability. They are equipped with the new solar chronograph caliber 8A50, which measures elapsed time in increments of 1/100 of a second. It counts every 1/100 of a second on the 2 o'clock sub-dial, every 1/10 of a second on the 10 o'clock sub-dial and every second on the 12 o'clock sub-dial. day becomes a 60-minute counter, with the hour hand hidden below the minute hand.