Patek Philippe CALIBER 28-20 REC 8J PS IRM C J User manual

CALIBER 28-20 REC 8J PS IRM C J
reference 5200

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INDEX

CALIBER 28-20 REC 8J PS IRM C J
reference 5200

caliber 28-20 rec 8jps irm cj
reference 5200

B A C K
F R O N T

ENGLISH
CALIBER 28-20 REC 8J PS IRM C J
reference 5200

11
MARATHON RUNNER
The heart of the Patek Philippe Gondolo 8 Days,
Day & Date Indication is the caliber 28-20 REC 8J
PS IRM C J movement that was developed explicitly
for this watch. With a power reserve of at least
192 hours or eight days, this rectangular timepiece
enriches Patek Philippe’s collection of manually
wound watches that are highly popular among
connoisseurs.
The movement unites venerable horological tradi-
tions with fascinating innovations that raise the
bar with respect to efficiency, dependability, and
precision. This is due to the Spiromax®balance
spring and the Pulsomax®escapement (the spring,
lever, and escape wheel are made of Silinvar®,
a derivative of silicon) that are virtually friction-
free, manufactured to extremely tight tolerances,
much lighter than steel, and unaffected by mag-
netic fields. The energy saved by these components
is available for an extended power reserve and
higher rate accuracy. It is also used to instantane-
ously switch the date by hand and aperture day;
at midnight, both indications advance to the next
day in the blink of an eye. This brief daily spectacle
takes place in the subsidiary dial at 6 o’clock, while
the power-reserve indicator at 12 o’clock gradually
moves toward day 9 in signal red, reminding the
owner to wind the exclusive movement.

12 INSTRUCTIONS
winding crown
The winding crown is used to wind the watch
(position 1) and to set the time (position 2).
winding
Crown pushed home (position 1): To wind the
watch.
The watch features a power-reserve indicator at
12 o’clock; its hand indicates how many days the
watch will continue to run until it needs to be
rewound. When fully wound, the power reserve of
the watch is 8 days. As soon as the power-reserve
hand reaches the red zone, the watch should be
fully rewound again. Should your watch have
stopped running, fully rewind it with 20 additional
turns of the crown when the power-reserve hand
indicates the fully wound state.
To benefit from the chronometric precision of your
watch, you should fully wind it two to three times
per week. When you take off your watch, place it
on a level surface with the case back facing down;
in this position, it will keep running with opti-
mized accuracy.
Note: 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.

13
setting the time
Carefully pull the winding crown out to posi-
tion 2, then turn it to move the hands forward or
backward.
If you turn the hands clockwise beyond midnight,
all displays of the calendar mechanism will advance
by one day. It is not advisable to move the hands
counterclockwise beyond midnight; this could
desynchronize the date display. However, this will
not damage the movement.
If the watch has stopped running, first move the
hands clockwise beyond 12 o’clock (midnight) and
verify that the date advances. Now, set the hands to
the current time; turn the hands beyond 12 o’clock
(noon) to set the time in the afternoon. Finally,
push the crown home again (position 1).
Caution: Take the watch off to set the time. This prevents
lateral pressure on the winding stem tube. 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 underwa-
ter. The water resistance of your watch is assured only when
the crown is pushed home.

14
day-of-week correction
Repeatedly press the corrector between 4 and
5 o’clock until the correct day of the week is
displayed.
date correction
Repeatedly press the corrector at 4 o’clock until
the correct date is displayed. This correction is
required five times a year after months with fewer
than 31 days.
Caution: Date and day corrections must be performed only
between 6 a.m. and 11 p.m.
To actuate the correctors, use only the stylus that was deliv-
ered with your watch. The use of any other type of tool could
damage your timepiece.
Date corrector
Day corrector
SecondsDate
Power reserve
Day of week
Position 1:
Winding
Position 2:
Setting
the time
1 2

15
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 authentic-
ity of your watch and validates your international
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, and clasp as well as to all other
facets that contribute to the precision and aesthetic
perfection of the timepiece. It covers the techni-
cal, functional, and aesthetic factors, but also rate
accuracy, dependability, and customer service
quality. Additionally, it reflects the maker’s know-
how and all other assets needed for the develop-
ment, production, and long-term maintenance of
an extraordinary timekeeping instrument.

16 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 manually wound 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
deviation can be easily corrected. The last test of
accuracy takes place on your wrist. Your tempera-
ment or the nature of your physical activities can
cause slight irregularities. Fluctuations in posi-
tion, 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.

17
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
to protect the movement against the ingress of
dust and moisture and to prevent damage if it is
immersed in water. Nonetheless, we recommend
that you prevent direct contact with water if your
watch has a leather strap.
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.
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.

18 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.

19
SPECIFICATIONS OF THE MOVEMENT
MANUALLY WOUND MECHANICAL MOVEMENT
CALIBER 28-20 REC 8J PS IRM C J
DIMENSIONS 28 × 20 mm
HEIGHT 5.05 mm
NUMBER OF PARTS 235
NUMBER OF JEWELS 28
POWER RESERVE Min. 8 days
BALANCE Gyromax®
FREQUENCY 28,800 semi-oscillations/hour (4 Hz)
ESCAPEMENT Pulsomax®
BALANCE SPRING Spiromax®
HALLMARK Patek Philippe Seal
displays
HOURS, MINUTES
SUBSIDIARY DIALS
– Seconds, day, date at 6 o’clock
– Power-reserve indicator at 12 o’clock
correctors
DATE AT 4 O’CLOCK
DAY BETWEEN 4 AND 5 O’CLOCK