Patek Philippe CH 28-520 C FUS User manual

CALIBER CH 28-520 C FUS
nautilus travel time chronograph

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INDEX

CALIBER CH 28-520 C FUS
nautilus travel time chronograph

caliber ch 28-520 c fus
nautilus travel time chronograph

b a c k
f r o n t

ENGLISH
caliber ch 28-520 c fus
nautilus travel time chronograph

11
The launch of the Nautilus in 1976 was the
beginning of an unprecedented success story. The
first model still ranks among the most coveted
timepieces at auctions to this very day. Its stainless
steel case with the spectacular porthole design,
the octagonal bezel with rounded corners, and its
rugged dependability defined new benchmarks in
casual elegance, elevating the watch to the status of
a style icon. Little changed during the forty years
that followed, except that the collection was sub-
tly reworked in 2006 for enhanced comfort and
readability without affecting its unique personal-
ity. At the same time, the self-winding Nautilus
chronograph was introduced as a welcome enrich-
ment of the model family. Now, Patek Philippe has
endowed the flyback chronograph with a further
complication which at a single glance presents
the time with a day/night indication for two time
zones. The two pushers with which local time can
be adjusted bidirectionally in one-hour increments
are so consummately integrated in the case that the
original silhouette of the Nautilus with the two
lateral bulges is fully preserved. Water-resistant to
120 meters, the Nautilus Travel Time Chronograph
is powered by the self-winding caliber CH 28-520
C FUS movement. With its column-wheel archi-
tecture and the patented Spiromax®balance spring,
it pairs venerable watchmaking traditions with
innovation in an exemplary manner.

12 INSTRUCTIONS
winding crown
The winding crown is used to manually wind the
watch (position 2) and to set the time (position 3).
Position 2:
Winding
Position 3:
Setting the time
Chronograph reset
and flyback button
Chronograph start/stop
button
Local time
Minute hand
Date
Pusher for
correcting local
time (+1 hour)
Pusher for
correcting local
time (–1 hour)
Day/night indicator
for home time
Date correction
Seconds, with
chronograph hand
Day/night indicator
for local time
60-minute counter
Home time
21 3

13
winding
Your watch incorporates a self-winding movement.
The movements of your wrist set a centrifugal mass
in motion; this tensions the mainspring which
stores the energy. When you take off your fully
wound watch, it will continue to run for at least
45 hours. When it has stopped after depleting the
power reserve, it can be rewound by hand (about
10 clockwise turns of the crown). Please wind the
watch before you put it on. This way, you can avoid
lateral pressure on the winding stem which in the
course of the years could damage the stem tube.
setting the time for the home time zone
(basic setting)
The reference time for your Nautilus Travel Time
Chronograph is the time at home, where you nor-
mally live or work. To set home time, first actuate
one of the pushers in the left-hand flank of the
case as many times as needed to superpose the
skeletonized and solid hour hands and to display
the same color in the day/night indicator aper-
tures at 3 o’clock (HOME) and at 9 o’clock
(LOCAL). Now, you can unscrew the crown, gently
pull it out, and move the hands clockwise or
counterclockwise until they indicate the current
time. The day/night indicator in the aperture at 3
o’clock (HOME) lets you check whether you have
set the correct time (white stands for the daylight
hours from 6 a.m. to 6 p.m., black for the night-
time hours from 6 p.m. to 6 a.m.). Once the watch
indicates the correct time, push the crown home
and screw it tight again.

14 Caution: Please set the time before you put the watch on.
This prevents lateral pressure on the winding stem. Please
use your fingernails to pull the crown out and turn it gently
between two fingertips.
Never pull out the crown in a humid environment or under-
water: the water resistance of your watch is assured only
when the crown is pushed home and screwed down.
date correction
The date indicated by your Nautilus Travel Time
Chronograph refers to the local time zone. To cor-
rect the date display, actuate the correction push
piece between 12 and 1 o’clock as many times as
needed to indicate the correct date.
Caution: The date correction system is disabled between
10 p.m. and 2 a.m. to avoid damage to the mechanism which
is active during this time. If a date correction is necessary,
please perform it between 2 a.m. and 10 p.m.
display of asecond time zone
Your watch has two center hour hands that move
synchronously and can be superposed. When the
two hands are not superposed, the solid luminous
hand indicates local time (in the time zone in
which you are currently located) while the skele-
tonized hand indicates home time (at your normal
place of residence or work). With the pushers in
the case flank at 8 and 10 o’clock, you can move
the solid local time hand clockwise or counter-
clockwise in one-hour steps.
Caution: Before you set a second time zone (local time),
check the day/night indicator at 3 o’clock (HOME) to make
sure that the two superposed hour hands indicate the correct
time at home and that the day/night indicator correctly
displays daytime or nighttime hours, for instance 6 a.m.
or 6 p.m.

15
You can set the local time hour hand to a given
time zone as follows:
– If you are traveling eastbound, press the pusher at
8 o’clock to move the hand clockwise by as many
hours as the two time zones are apart (press once
for +1hour).
– If you are westbound, press the pusher at 10
o’clock to move the hand counterclockwise by as
many hours as the two time zones are apart (press
once for –1hour).
– If you move the hour hand for local time beyond
midnight in either direction, the date will also
switch forward or backward.
The skeletonized hand continues to indicate home
time, and the day/night indicator at 3 o’clock ref-
erenced to this hand (HOME) shows you whether
it is momentarily day or night in your home time
zone (normal place of residence or work).
If you continue your journey and pass through
further time zones, simply repeat the procedure
described above with the + or – pushers.
As soon as you have returned to your home time
zone (normal place of residence or work), simply
press the + or – pushers as many times as needed to
superpose the two hour hands again. Make sure the
two day/night indicators (HOME and LOCAL) indi-
cate the same time of day and have the same color.

16 chronograph
The chronograph is started and stopped with the
button at 2 o’clock. The chronograph and minute-
counter hands are reset to zero with the button at
4 o’clock. The same button controls the flyback
function during an ongoing time measurement.
When you push the button at 4 o’clock while the
chronograph hand and the minute-counter hand
are running, this will cause both hands to fly back
to zero and instantly start a new measurement.
In other words, the stop and restart functions are
combined. Conversely, if you first stop the chrono-
graph and minute-counter hands by pressing the
button at 2 o’clock, the actuation of the button at
4 o’clock will cause both hands to return to the
zero position and stay there. To reset the chrono-
graph and minute-counter hands, make sure you
press the button at 4 o’clock firmly and squarely
in the middle.

17
TAKING CARE
OF YOUR WATCH
certificate of origin
Your watch is delivered with a certificate of origin
that indicates the movement and case numbers.
The certificate is valid only if it is dated, signed by
an Authorized Patek Philippe Retailer, and com-
pleted with your name. It guarantees the authen-
ticity of your watch and validates your warranty
privileges for a period of two years after the date
of sale. The unique movement and case numbers
of each watch are transcribed into the workshop
journals. With this information, you may have
yourself entered in the Patek Philippe Register of
Owners and will obtain the International Patek Philippe
Magazine free of charge.
patek philippe seal
As an all-encompassing hallmark of
quality, the Patek Philippe Seal applies
to the entire watch, including the
movement, case, dial, hands, pushers,
strap or bracelet, and clasp as well as
to all other facets that contribute to the precision
and aesthetic perfection of the timepiece. It cov-
ers the technical, functional, and aesthetic fac-
tors, but also rate accuracy, dependability, and
customer service quality. Additionally, it reflects
the maker’s know-how and all other assets
needed for the development, production, and
long-term maintenance of an extraordinary time-
keeping instrument.

18 quality control
The movements and completely assembled watches
are subject to a series of technical tests and visual
inspections to verify their rate accuracy, winding
speed, power reserve, reliability, water resistance,
and overall appearance. After it was assembled,
your self-winding watch will already have run for
several weeks before leaving the workshops; it
fully complies with the stringent criteria of the
Patek Philippe Seal.
rate accuracy
The rate accuracy of Patek Philippe watches is veri-
fied in several phases of manufacturing, both with
uncased and fully cased movements. The final test
is performed with a wrist motion simulator and
the results must conform to the following Patek
Philippe precision benchmarks:
The rate accuracy of calibers with a diameter of 20 mm or
larger must range within –3and +2seconds per 24 hours.
The precision of a watch is determined by how
accurately it keeps the time. A watch that is fast or
slow is considered precise if the amount by which
it is fast or slow remains constant. Such a devia-
tion can be easily corrected. Consequently, the last
test of accuracy takes place on your wrist. Your
temperament or the nature of your physical activi-
ties can cause slight irregularities. Fluctuations in
position, temperature, or air pressure, the presence
of magnetic fields (as produced by most electronic
devices, metal detectors, household appliances,
etc.) as well as vibrations and other factors may
also affect its accuracy.

19
If you notice that your watch exhibits such
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.

20 If you have any questions regarding the maintenance of your
watch or need the address of the Authorized Patek Philippe
Service Center nearest you, contact our International Customer
Service department in Geneva, or visit www.patek.com.