Ratchet Bezel - Victorinox CHRONOGRAPHS Watch Basic Operating Instructions Manual

RATCHET BEZEL (Available on select models only.)
The rotating ratchet bezel was designed to enable divers to time dives,
but can be used to measure any elapsed time period. The turning bezel
has grooves to make it easy to operate.
To measure elapsed time, simply rotate the bezel toward you until the
zero mark (also the 60 mark) is opposite the minute hand. From this
moment on, the position of the minute hand in relation to the zero mark
on the bezel will indicate the total number of minutes that have elapsed.
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