Accurist MB 119 Operating Instructions Manual page 9

Using the chronograph:
1. Press TR Button to start and stop chronograph.
2. Press BR Button to reset the chronograph.
(the second and minute hands will return to the 12 o'clock (0) position)
Chronograph zero set:
This procedure is only necessary when the battery is replaced, or when the
Chronograph hands do not return to the 12 o'clock (0) position.
1. Gently pull out crown to position C.
2. Push TR Button to advance the sweep second hand to the 12 o'clock position.
Please note each push of the TR button will advance the hand 1 second.
Alternatively, depress and hold the button for 2 seconds and the hand advances
continuously.
3. Push in crown to position A.