Using The Chronograph - Citizen 520 Instruction Manual

5. Using the Chronograph

The chronograph function of this watch is able to measure and display elapsed
time up to 59 minutes 59 seconds in 1 second units. The chronograph second
and minute hands are placed at 12 o'clock position before the measurement
starts. After the chronograph displays elapsed time for 59 minutes 59 seconds,
it resumes timing from 0 seconds. The chronograph minute hand continues
to move until the chronograph is stopped by pressing button (B) even after 59
minutes 59 seconds have elapsed.
Chronograph second hand
Chronograph minute hand
Button (B)
18
Button (A)
8