iwc Portofino Operating Instructions Manual page 18

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T H E T E C H N I C A L R E F I N E M E N T S O F T H E
P O R T O F I N O H A N D - W O U N D P U R E C L A S S I C
Your IWC watch shows you the time in hours and minutes, to-
gether with the power reserve on the side facing the movement.
The hand-wound mechanical movement, which is timed in five
pos itions, with a temperature-compensating balance spring
made of Nivarox * of the highest quality and an unbreakable
®
Nivaflex * mainspring, has a power reserve of approximately
®
8 days (192 hours) when fully wound. Your Portofino Hand-Wound
Pure Classic is protected by a sapphire glass of hardness grade 9
on Mohs' scale. Your watch is water-resistant 3 bar. To ensure
that this extra ordinary watch continues to perform faultlessly in
the future, it is essential to observe a few important operating
instructions.
P O R T O F I N O H A N D - W O U N D P U R E C L A S S I C