Patek Philippe 5950 User manual

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Reference 5950

Caliber CHR 27-525 PS

Ultra-thin manually wound wristwatch

with monopusher rattrapante chronograph.

The manually wound caliber CHR 27-525 PS is the

world’s thinnest monopusher split seconds chro-

nograph. It unites Geneva’s grand watchmaking

heritage with 21st-century technology.

The highly complex movement, crafted one by

one to artisanal perfection, is cased in cushion-

shaped rose gold with a retro-modern design

inspired by the ﬁrst 1920s Patek Philippe wrist

chronographs.

Haute horlogerie at its very ﬁnest

Patek Philippe’s caliber CHR 27-525 PS is the

world’s thinnest monopusher rattrapante chro-

nograph with column wheel control. Its height:

5.25 mm. Not least, this accomplishment is due to

the ingenious design of the continuously running

60-minute counter. Its innovative conﬁguration is

responsible for the slimmer silhouette and at the

same time, it equalizes the torque differences be-

tween the running and stopped states of the chro-

nograph. The three chronograph wheels (driving,

clutch, and seconds wheels) are another exclusive

feature of the caliber CHR 27-525 PS movement.

Their novel patented toothing geometries reduce

wear and optimize power transmission within the

chronograph mechanism.

The pinnacle of artisanship

The caliber CHR 27-525 PS is a classic split sec-

onds chronograph construction with two column

wheels that, as always in Patek Philippe timepieces,

are crowned with polished caps. The bridges à

l’ancienne are meticulously ﬁnished with polished

chamfers and Geneva striping. Every caliber is in-

dividually hand-crafted by master watchmakers in

the Haute Horlogerie workshops. Each component is

individually ﬁled, chamfered, polished, adjusted,

and ﬁnished. Then, the watchmaker performs the

so-called repassage en blanc – a trial assembly pro-

cedure – to carefully check all functions. After-

wards, the entire movement is taken apart again,

cleaned, reassembled, lubricated, and adjusted.

These ancestral production methods result in horo-

logical masterpieces that exceed the expectations of

even the most discerning connoisseurs.

Rattrapante hand pusher

Winding crown

Position 1: to wind the watch

Position 2: to set the time

Subsidiary seconds

Chronograph hand Chronograph pusher

60-minute counter

Rattrapante hand

Instructions

WINDING CROWN

The winding crown is used to wind the watch

(position 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

least 48 hours. We recommend that you wind

your watch each day at about the same time,

preferably in the morning (about 25 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. Once the correct time is set,

press the crown home again. The movement has a

stop-seconds mechanism (balance wheel blocker)

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.

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 rattrapante chronograph al-

lows you to measure the duration of events,

record lap times. These measurements are per-

formed with the two large sweep stop hands – the

chronograph and rattrapante hands – and with

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

most split seconds chronographs, the Ref. 5950

is a three-phase chronograph that requires only

two pushers.

Actuating the pusher in the winding crown se-

quentially activates the three following com-

mands:

1. Simultaneously start the chronograph and

rattrapante hands,

2. Simultaneously stop the chronograph and

rattrapante hands,

3. Reset the chronograph and rattrapante hands.

Note: To avoid chronograph start problems, we recom-

mend that you postpone the use of the chronograph for 2

minutes after having set the time.

The pusher at 2 o’clock controls only the rattrapante hand.

MEASURING DURATIONS AND STOPPING LAP TIMES

When the event to be timed begins, actuate the

pusher in the winding crown: The superposed

chronograph and rattrapante hands begin to run.

To measure a lap time, press the pusher at 2 o’clock:

The rattrapante 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 rattrapante 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 rattrapante hands will

both return to zero.

Caution: To reset the chronograph and rattrapante hands

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

trapante 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.

CALIBER: CHR 27-525 PS, MANUALLY WOUND

DIAMETER: 27.30 MM

HEIGHT: 5.25 MM

NUMBER OF PARTS: 252

NUMBER OF JEWELS: 27

POWER RESERVE: WITH THE CHRONOGRAPH DISENGAGED:

48 HOURS MIN.

BALANCE: 2-ARM GYROMAX® WITH 8 POISING WEIGHTS

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

BALANCE SPRING: BREGUET

HALLMARK: PATEK PHILIPPE SEAL

Movement technical data

Care and Maintenance

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. However, if your watch

receives a blow to the crown or the crystal, its

water resistance may be impaired.

If your watch has a leather or satin strap, we

recommend that avoid exposing it to water alto-

gether.

SERVICE

We recommend that you have your watch ser-

viced every three to ﬁve years. The best way to

do this is to bring your watch to an Authorized

Patek Philippe Retailer who will be happy to for-

ward 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 and then inspect, clean, and lubri-

cate all the individual parts prior to reassembly.

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.

If you have any questions regarding the maintenance of

your watch, contact the Authorized Patek Philippe Retailer

nearest you or our International Customer Service depart-

ment in Geneva, or visit www.patek.com.

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 workshops in Geneva are authorized to

replace this back.

PATEK PHILIPPE SEAL

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 aes-

thetic perfection of the timepiece. It covers the

technical, functional, and aesthetic factors, but

also rate accuracy, dependability, and customer

service quality. Additionally, it reﬂects the mak-

er’s know-how and all other assets needed for the

development, production, and long-term main-

tenance of an extraordinary timekeeping instru-

ment.

Français

Référence 5950

Calibre CHR 27-525 PS

Chronographe mono-poussoir

à rattrapante

La Référence 5950 est équipée du calibre CHR

27-525 PS à remontage manuel, le mouvement

de chronographe mono-poussoir à rattrapante le

plus plat du monde. Une alliance parfaite entre

grand art horloger genevois et technologie du

XXIe siècle.

Ce mouvement ultracomplexe, fabriqué à la

main et à l’unité, est abrité dans un boîtier de

forme coussin dont le style rétro-contemporain

s’inspire des premiers chronographes-bracelets

Patek Philippe des années 1920.

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