Operation Manual

Calibration (Resetting) of Chronographs

This procedure should be followed if the second hand of the chronograph

does not return to the null position after the chronograph has been reset or

the battery has been replaced.

All calibres:

1. Pull the crown out to position 2.

Calibre OS20, OS60, OS62:

2. Press button “A” to set the second hand

of the chronograph to the zero position.

For OS60 and OS62:

Press button „B“ to set the 1/20

second hand to the zero position.

The hands can be advanced rapidly by

continuously pressing button „A“ or „B“.

Normal Position

Position 2

Position 1

Normal Position

Position 2

Position 1