IWC Schaffhausen 5454 Mode D'emploi page 14

The technical refinements of the Portuguese Hand-Wound
Your IWC watch shows you the time in hours, minutes and seconds. The
mechanical movement has 18 jewels (synthetic rubies) and a power reserve
of approximately 46 hours when fully wound. Your Portuguese Hand-Wound
is protected by an arched-edge sapphire glass of hardness grade 9 on Mohs'
scale. Your watch is water-resistant 3 bar, the movement is specially en-
graved and decorated. To ensure that this extraordinary watch continues
to perform faultlessly in the future, it is essential to observe a few important
operating instructions.