iwc PORTOFINO CHRONOGRAPH Mode D'emploi page 18

The technical refinements
of the Portofino Chronograph
Your IWC watch shows you the time in hours, minutes
and seconds, together with the date and the day. You can
use the integrated chronograph to measure any period of
time up to 12 hours in seconds, minutes and hours. Stop
times can be added together. The mechanical movement
with automatic winding has 25 jewels (synthetic rubies)
and a power reserve of approximately 44 hours when
fully wound. The Portofino Chronograph is water-resist-
ant 3 bar and protected by a sapphire glass of hardness
grade 9 on Mohs' scale. To ensure that this extraordinary
watch continues to perform faultlessly in the future, it is
essential to observe a few important operating instruc-
tions.