The chronograph can measure up to 60 minutes in seconds. Time measured can be read with chronograph central second hand and also with the minute hand in the counter at 9h. Here are the steps for using it.
To start your chronograph, press the pushbutton at 2H once
The chronograph can be stopped and restarted as many times as necessary by pressing the same button
To reset your chronograph, you just have to press the pushbutton at 4H
If your chronograph hand doesn’t come back to 12H, pull the crown
Replace your chronograph hand by pressing the pushbutton at 2H
You are ready to use your chronograph perfectly