USING THE CHRONOGRAPH
OS00/OS10/OS20 This chronograph is able to measure and display time in 1/1 second united
up to maxinum of 11 hours 59 minutes 59 seconds.The chronograph second hand keeps conti-
nuously for 11 hours 59 minutes 59 seconds after starting.
OS21 This chronograph is able to measure and display time in 1/1 second united up to maxinum
of 1 hour.
JS 50 This chronograph can measure and display time in fractions of 1 second to a maximum
of 29 minutes 59 seconds. The timer will stop automatically after running continuously for 30
minutes.
Measuring time with the chronograph
1. The chronograph can be started and stopped each time button "A" is pressed.
2. Pressing button "B" resets the chronograph and the chronograph second hand, chronograph
minute hand, and chronograph hour hand return to zero position
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