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P O R T O F I N O M I D S I Z E A U T O M A T I C D A Y & N I G H T
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 M I D S I Z E A U T O M A T I C
D A Y & N I G H T
Your IWC watch shows you the time in hours, minutes and sec-
onds. A 24-hour hand shows you an additional time zone of your
choice. As you pass through a time zone, you can adjust the
hour hand of your watch in steps without stopping the mech-
anical movement (Time Zone Corrector = TZC). The mechanical
movement with automatic winding has a power reserve of ap-
proximately 42 hours when fully wound. Your Portofino Midsize
Automatic Day & Night is protected by a sapphire glass of hard-
ness grade 9 on Mohs’ scale. Your watch is water-resistant 3 bar.
To ensure that this extraordinary watch continues to perform
faultlessly in the future, it is essential to observe a few important
operating instructions.
