Calypso Watches IKM635 Manuel D'instruction page 14

7. HOW TO USE THE CHRONOGRAPH
NORMAL TIME CHRONOGRAPH
BEFORE 30 MINUTES AFTER 30 MINUTES
1/100 SECONDS
1/10 SECONDS
MINUTES SECONDS HOURS
START RUNNING
SECONDS
FIRST LAP
READ
MINUTES
24
STOP
SECOND LAP SECOND LAP LAST LAP
COUNTING READ COUNTING
RESET NORMAL TIME
LAST LAP STOP TIME
READ
25