iwc IW3905 Operating Instruction page 20

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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 u g i e s e r Y a c h t c l u B c h r O n O g r a p h
Your IWC watch shows you the time in hours, minutes and sec-
onds, together with the date. You can use the integrated flyback
chronograph to measure any period of time in seconds, minutes
and hours. Stop times can be added together. The mechanical
movement with automatic winding has a power reserve of ap-
proximately 68 hours when fully wound. The engraved rotor winds
the watch in both directions of rotation via the IWC double-pawl
winding system. Your Portugieser Yacht Club Chronograph is pro-
tected by a convex sapphire glass of hardness grade 9 on Mohs'
scale. Your watch is water-resistant 6 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 u g i e s e r Y a c h t c l u b c h r o n o g r a P h