iwc PORTOFINO Mode D'emploi page 16

The technical refinements of the Portofino Hand-Wound
Your IWC watch shows you the time in hours, minutes and seconds as well
as displaying the moon phase. The watch is water-resistant 3 bar and pro-
tected by an antireflective coated sapphire glass of hardness grade 9 on
Mohs' scale. The mechanical movement visible through the case back has
18 jewels (synthetic rubies). It is specially engraved and decorated and has
a power reserve of 46 hours when fully wound. To ensure that this extraor-
dinary watch continues to perform its tasks in the future, it is essential to
observe a few important operating instructions.