Patek Philippe Nautilus Travel Time Chronograph Manual De Instrucciones página 19

If you notice that your watch exhibits such
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irregularities, please do not hesitate to take it
to an Authorized Patek Philippe Retailer or an
Authorized Service Center where no effort will
be spared to assure that it is adjusted to meet your
expectations.
water resistance
Your watch is fitted with different types of seals
and a screw-down crown to protect the movement
against the ingress of dust and moisture and to
prevent damage if it is immersed in the water. The
water resistance of your Nautilus is assured only if
the crown is screwed down.
service
We recommend that you have your watch serviced
every five years. For this purpose, we suggest that
you bring or send your watch to an Authorized
Patek Philippe Retailer or an Authorized Service
Center. This gives you the assurance that your
watch will be entrusted to hands of a qualified
Patek Philippe watchmaker in Geneva or at an
Authorized Service Center.
The watchmaker will completely disassemble the
movement and then clean and inspect all parts
and lubricate them in the reassembly process.
All functions of the watch will also be tested in
detail and the escapement regulated if necessary.
Finally, its rate accuracy will be monitored and
precision-adjusted for a further period of two
weeks. The entire process may take several weeks
because each watch must undergo a complete
series of tests to fulfill the strict quality criteria
of Patek Philippe.