Citizen AT2141-52L Instruction Manual page 20

Note: • Do not subject the chronograph to strong impacts while chronograph
timing is in progress. Subjecting the watch to a strong impact during
chronograph timing or when the chronograph has stopped
automatically after 60 minutes have elapsed can cause the
chronograph minute hand to shift out of position. If this happens, press
button (A) to reset to the 12:00 position before using the chronograph
again.
19