Patek Philippe 5372 User manual

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Reference 5372

Caliber CHR 27-525 PS Q

Monopusher split-seconds

chronograph with perpetual calendar.

Patek Philippe has created a totally new look

for its famous split-seconds chronograph in

platinum with a perpetual calendar. Just like the

2015 Ref. 5370 and the 2016 Ref. 5374, it comes

in a round platinum case with a concave bezel

as well as countersunk and satin-ﬁnished ﬂanks.

The dial in gold with a blue sunburst pattern

and gold applied numerals also presents a subtly

reworked appearance. It is a harmonious blend

of sophisticated technology, elegance, and

readability.

VIRTUOSITY TIMES TWO

The caliber CHR 27-525 PS Q movement is a fur-

ther reﬁnement of the CHR 27-525 PS, the world’s

thinnest monopusher rattrapante chronograph

movement with column wheel control (height:

5.25 mm). It presents a classic conﬁguration with

two column wheels and a number of technical

features such as a continuously running 60-min-

ute counter and new patented toothing proﬁles

that reduce wear and simultaneously optimize

the chronograph functions. To match the ultra-

thin construction of the chronograph mechanism,

Patek Philippe spared no effort to minimize the

thickness of the perpetual calendar module as well.

It was a formidable challenge, further complicated

by the small caliber diameter. Thus, the engineers

had to develop novel technical solutions, two of

which resulted in patent applications.

HAUTE HORLOGERIE AT ITS VERY FINEST

In keeping with venerable Patek Philippe tradi-

tions, the CHR 27-525 PS Q is a paragon of aesthet-

ics and craftsmanship. The bridges à l’ancienne

are meticulously ﬁnished with polished chamfers

and Geneva striping. Every caliber is individually

hand-crafted by master watchmakers in the Haute

Horlogerie workshops. Each component is indi-

vidually ﬁled, chamfered, polished, adjusted, and

ﬁnished. Then, the watchmaker performs the so-

called repassage en blanc – a trial assembly proce-

dure – to carefully check all functions. Afterwards,

the entire movement is taken apart again, cleaned,

reassembled, lubricated, and adjusted. These an-

cestral production methods result in horological

masterpieces that exceed the expectations of even

the most discerning connoisseurs.

Instructions

WINDING CROWN

The winding crown is used to wind the watch (po-

sition 1) and to set the time (position 2).

MANUALLY WOUND

Your watch has a manually wound movement.

When fully wound, it has a power reserve of at

leat 38 hours. We recommend that you wind

your watch each day at about the same time, pref-

erably in the morning (about 15 clockwise turns

of the crown).

Caution: 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. Turn the crown gently and uniformly and stop as soon

as you feel resistance; if you wind the watch too vigorously,

this might damage the movement.

SETTING THE TIME

To set the time, pull the crown out, and turn it in

either direction. The day/night indicator makes it

possible to distinguish between am and pm hours

(white = morning hours between 0:00 midnight

and 11:59 am, black = afternoon hours between

12:00 noon and 11:59 pm). When you turn the hands

clockwise beyond midnight, the calendar displays

will advance as well. We advise against turning

the hands counterclockwise across midnight be-

cause this would desynchronize the calender dis-

plays; however, it would not damage the calendar

mechanism. Set the hands to the correct time, then

push the crown home again. The movement has a

stop-seconds mechanism that allows the watch to

be synchronized with a time signal to an accuracy

of one second. The seconds hand stops when the

winding crown is pulled. It starts running again as

soon as you push the crown home again.

Moon phases

Date correction

Month correction

Split-seconds hand pusher

Winding crown

Position 1: To wind the watch

Position 2: To set the time

Chronograph pusher

60-minute counter

Month

Leap year cycle

Split-seconds hand

Moon-phase correction

Subsidiary seconds

Day of week

Day of week correction

Day/night indicator

Chronograph hand

Date

1 2

Caution: Please set the time only when the chronograph

is stopped and the chronograph and rattrapante hands both

return to zero, and preferably – to prevent lateral pressure

on the winding stem – before you put the watch on. We

recommend that you turn the crown only with two ﬁngers

and use your ﬁngernails to pull it out.

CHRONOGRAPH

The Patek Philippe split-seconds chronograph

allows you to measure the duration of events

or record lap times. These measurements are

performed with the two large sweep stop hands –

the chronograph and split-seconds hands – and with

the small 60-minute counter at 3 o’clock. Unlike

most split-seconds chronographs, the Ref. 5372 is

a three-phase chronograph that requires only two

pushers. Actuating the pusher in the winding crown

sequentially activates the three following commands:

1. Simultaneously start the chronograph and

split-seconds hands,

2. Simultaneously stop the chronograph and

split-seconds hands,

3. Reset the chronograph and split-seconds hands.

The pusher at 2 o’clock controls only the split-seconds hand.

MEASURING DURATIONS AND STOPPING LAP TIMES

When the event to be timed begins, press the pusher

in the winding crown: The superposed chronograph

and split-seconds hands begin to run. To measure

a lap time, press the pusher at 2 o’clock: The split-

seconds hand will stop but the chronograph hand

keeps running. Now you can take a note of the lap

time. When you actuate the pusher at 2 o’clock

again, the split-seconds hand will catch up with the

chronograph hand and both hands, now superposed,

will continue running. This function can be activated

as many times as you wish. To stop the ﬁnal time,

actuate the pusher in the winding crown: this will

stop the chronograph hand and you can take a note

of the duration of the event. When you actuate the

pusher in the winding crown again, the chronograph

and split-seconds hands will both return to zero.

Caution: To reset the chronograph and split-seconds hands

to zero at the time time, they must be superposed. If the split-

seconds hand is still indicating a lap time, actuate the pusher

at 2 o’clock to make it catch up with the chronograph hand,

and then reset both hands to zero by actuating the pusher in

the winding crown.

PERPETUAL CALENDAR

The perpetual calendar indicates the date, the day

of the week, and the month, automatically taking

into account months with 28, 29, 30, and 31 days: it

switches directly from September 30 to October 1 or,

in non-leap years, from February 28 to March 1. The

date, day, and month are complemented by a leap-

year indication and a moon-phase display, which is

so accurate that it deviates from the true lunar cycle

by only one day every 122 years. If the watch is wound

daily, the perpetual calendar will not require any

corrections before February 28, 2100; this is a secular

year that by exception omits the 29th of February.

Note: The date change mechanism is active between 10 pm and

2 am whereas the moon phase switches between 12 noon and 2

pm. During these time periods, adjustments of the calendar and

moon-phase indications with the correction push pieces should

be avoided. To assure that corrections will not interfere with the

operation of these mechanisms, ﬁrst set your watch to 6 am;

observe the day/night indicator (white range). If your watch

has stopped running, do not make corrections or adjustments

before rewinding it with about 15 clockwise turns of the crown.

Correction push pieces should be actuated exclusively with the

correction stylus that was delivered with the watch. The use of

any other tool could damage your timepiece. The adjustments

must be performed in the order described below.

DATE CORRECTION

To set the date, actuate the correction push piece at 12

o’clock as many times as needed to display the current

date. The day of the week will advance simultaneously

with the date, but it can also be corrected separately if

it does not correspond to the date. The moon phase

can also be corrected separately.

CORRECTION OF LEAP-YEAR CYCLE AND MONTH

To simultaneously set these two displays, press the

correction push piece between 12 and 1 o’clock

as often as needed to display the desired year

numeral (4 = leap year, 1 = 1st year after a leap year,

2 = 2nd year after a leap year, 3 = 3rd year after a

leap year) and the correct month are displayed.

For guidance on the leap-year cycle, consult the

brochure entitled “Leap year and full moon calendar”.

DAY OF WEEK CORRECTION

To correct the day of the week, actuate the push

piece between 8 and 9 o’clock as often as needed

to display the correct day.

MOON-PHASE CORRECTION

The moon-phase display changes in the early

afternoon. Its mechanism is active between 12

noon and 2 pm. Each time the push piece between

10 and 11 o’clock is pressed, the moon-phase disk

will advance by one day. To begin the correction

procedure, advance the moon-phase disk until a

full moon is displayed in the middle of the aperture.

Consult a moon-phase calendar (see brochure “Leap

year and full moon calendar”) or the website www.

patek.com (click on “Collection", "Movements-

complications", "Moonphase-indicator”) to ﬁnd

out how many days have elapsed since the last full

moon (including the day on which you correct the

display). To correctly set the moon-phase display,

press the push piece as many times as the number

of days that have elapsed since the last full moon.

Movement features

Manually wound mechanical movement

Caliber CHR 27-525 PS Q

ULTRA-THIN MONOPUSHER SPLIT-SECONDS CHRONOGRAPH

WITH PERPETUAL CALENDAR

DIAMETER 27.30 MM

HEIGHT 7.30 MM

NUMBER OF PARTS 476

NUMBER OF JEWELS 31

POWER RESERVE WITH THE CHRONOGRAPH DISENGAGED:

MIN. 38 HOURS - MAX. 48 HOURS

BALANCE 2-ARM GYROMAX®WITH 8 POISING WEIGHTS

FREQUENCY 21,600 SEMI-OSCILLATIONS/HOUR (3 HZ)

BALANCE SPRING BREGUET

HALLMARK PATEK PHILIPPE SEAL

Care and maintenance

PATEK PHILIPPE SEAL

The Patek Philippe Seal applies to the entire watch,

including the movement, case, dial, hands, push-

ers, strap, and clasp as well as to all other facets

that contribute to the precision and aesthetic per-

fection of the timepiece. It covers the technical,

functional, and aesthetic factors, but also rate ac-

curacy, dependability, and customer service qual-

ity. Additionally, it reﬂects the maker’s know-how

and all other assets needed for the development,

production, and long-term maintenance of an ex-

traordinary timekeeping instrument.

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.

CHANGING THE CASE BACK

Your watch comes with a sapphire-crystal case back

as well as with an interchangeable solid-metal back.

Only our watchmakers at the Patek Philippe work-

shops in Geneva are authorized to replace this back.

SERVICE

We recommend that you have your watch ser-

viced every ﬁve years. The best way to do this is to

bring your watch to an Authorized Patek Philippe

Retailer who will be happy to forward it to our

workshops for you. You can then be assured that

your watch will be inspected and overhauled by

a qualiﬁed master watchmaker at Patek Philippe

headquarters in Geneva.

The watchmaker will completely disassemble the

movement, clean all of its parts, then readjust and

lubricate it during 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 en-

tire process may take several weeks because each

watch must undergo a complete series of tests to

fulﬁll the strict quality criteria of Patek Philippe.

If you have any questions regarding the mainte-

nance of your watch, contact the Authorized Patek

Philippe Retailer nearest you or our International

Customer Service department in Geneva, or visit

www.patek.com.

Table of contents

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