Press Release

Patek Philippe, Geneva
May 2013

Patek Philippe Ref. 6002
Sky Moon Tourbillon
The grand creation of a grand complication
During the 174 years since it was founded, Patek Philippe has demonstrated its expertise in the entire
spectrum of horological complications. Impressive manifestations of this competence include theCalibre 89 presented in 1989. With 33 complications, it holds the world record as the most complicatedportable mechanical watch. The Ref. 5002 Sky Moon Tourbillon is the manufacture's most complicatedwristwatch with 12 complications on two dials. Now, with the Ref. 6002, the Sky Moon Tourbillon has asuccessor that redefines the term grand complication – with a case and dial that require the utmost incraftsmanship and artistry.
As regards the movement, the new Ref. 6002 is largely identical with its predecessor. It possesses aminute repeater with two cathedral gongs and a tourbillon; on the front dial, it indicates standard timeand features a perpetual calendar with a retrograde date and a moon-phase display. The rear dial sets
the stage for astronomical functions: it shows the northern sky, sidereal time, and the angularprogression and phases of the moon. Unlike the Ref. 5002, it indicates the moon phases instead of themoon age and features apertures instead of hands for the day of the week, month, and leap year
displays.
The totally new aspect of the Sky Moon Tourbillon Ref. 6002 is its appearance, with lavish decorations
that elevate it to the status of a grand creation. To refer to a case or a dial is almost a sacrilege in thecontext of the Ref. 6002. Sculpture would be the more fitting term for a genuine work of art like the Sky
Moon Tourbillon. In particular, it showcases two artisanal skills: the art of the engraver and that of theenameler. Since the advent of Geneva's watchmaking heritage in the late 16th century, both of thesecrafts have been inseparably allied with watchmaking.
Because the first portable timepieces of the epoch were still very inaccurate and had to be reset
several times a day, they were primarily objects of prestige. That made it all the more important toendow them with precious materials and painstaking decorations as testimony to the influence andaffluence of their owners. The invention of the balance spring toward the end of the 17th century
marked the beginning of the era of precision timepieces that were also suitable for scientificmeasurements.
The Patek Philippe Sky Moon Tourbillon Ref. 6002 unites these two dimensions with incomparable
poise: the precision of a tourbillon timekeeping instrument with the rate accuracy of a chronometer andthe immaculate decorations that reflect the finest artisanal traditions of Geneva.

Chemin du Pont-du-Centenaire 141 – CH - 1228 Plan-les-Ouates
Mail address: P.O. Box 2654 – CH - 1211 Geneva 2
Tel. + 41 22 884 20 20 – Fax + 41 22 884 25 47 – www.patek.com

Continued 2

The Sky Moon Tourbillon Ref. 6002: a sculpture for the wrist
The case of the Ref. 6002 is a superb oeuvre carved from the massive white-gold blank entirely byhand. The eloquent ornaments, arabesque garlands, and gently curved elements of the Calatrava
cross are produced with chip removal techniques using sharp burins that not only incise the precious
metal but actually "lift" the decorations out of the gold surface. An involuntary movement or a brief
moment of distraction would ruin the case and it would have to be re-melted. But the engraver not only
molds the gold in bas-relief but also applies the chisel to sculpt life into the small surfaces between thethree-dimensional structures. Thus, more than one hundred hours of work are invested until theengraving alone meets the approval of the master artisan and Patek Philippe's President Thierry Stern.
With the same precision and artistry, the engraver uses relief techniques to decorate the minuterepeater slide in the case flank, the two crowns, and the white-gold clasp that locks the strap. Theornaments of the two crowns are as informative as they are decorative: The dynamometric winding
crown at 4 o'clock shows an arrow in relief to indicate the direction of rotation, while the moon andstars in relief on the crown at 2 o'clock reveal that it is intended to adjust sidereal time and the celestial
functions on the rear dial.
An expressive face in champlevé and cloisonné enamel
The front dial of the Ref. 6002 is a work of art in its own right. Its small surface unites the skills of many
specialists who master milling, applique setting, and – most spectacularly – enameling with thechamplevé and cloisonné techniques.
The dial is crafted from a thin disk in gold that is milled out until the crisp railway track scale, thesurrounds of the dial center, calendar apertures, and moon-phase display stand out in relief. This isfollowed by the work of the specialized champlevé enameler who fills the recesses around the relief
contours with blue enamel by hand. Even the smallest bounded recesses are carefully filled withenamel, applied with an ultra-fine brush. When all recesses have been uniformly filled, the miniature
oeuvre is fired in the oven at 850° Celsius.
Conversely, the center of the dial is decorated with so-called cloisonné enamel. This techniqueinvolves shaping the contours of the blossoms and leaves using fine, flattened gold wire that must be
affixed to the dial. The result of countless hours of painstaking work is numerous separate cells(cloisons) that are then filled with enamel of different shades of blue. Again, the next step is firing andfusing for eternity in an oven at about 850° Celsius.
While most contours in the form of silvery relief structures are embedded in blue enamel, the Roman
hour numerals are gold appliques. Other dial elements such as the numerals and the markers of theretrograde calendar scale, the PATEK PHILIPPE GENEVE and TOURBILLON inscriptions, themovement number and the delicately pointed stars are painted bright gray.
The small lunar disk is another fine example of champlevé: the circumference of the moon iselaborated in relief and enclosed with blue enamel. The cratered landscape of the moon’s surface isemulated with gradations of white, gray, and black enamel. This represents a huge effort for a single
dial element, but it certainly ranks among the most poetic complications imaginable. For a watch of thelikes of the Sky Moon Tourbillon, no amount of work can be deemed unreasonable when the issue is topay tribute to the movement that ticks beneath the phenomenal dial.

Continued 3

A highly complex masterpiece
In horological terms, the Ref. 6002 distinguishes itself only marginally from its predecessor. Even
though the caliber RTO 27 QR SID LU CL is the Genevan manufacture's most complicated wristwatchmovement, its concept is to unite not as many as possible, but the most fascinating complications in
the compact case of a wristwatch: a perpetual calendar with a retrograde date display, a minuterepeater, a tourbillon, the display of sidereal time and a depiction of the nocturnal sky with the motionof the stars, the angular progression of the moon, and the moon phases. The analog displays for theday of the week, the leap year cycle, and the month have been replaced with aperture displays and themoon-age indication at 6 o'clock with a moon-phase display featuring the typical curved cutout thatemphasizes the poetic personality of the watch.
Minute repeater with cathedral gongs
The minute repeater was and still is the pinnacle of horological artistry. During the past 25 years, Patek
Philippe has devoted considerable attention to this complication, imbuing the hour, quarter-hour, andminute strikes with a new dimension in sonority. Thanks to a proprietary alloy developed explicitly forthe gongs and the decades of experience accrued by Patek Philippe's specialists, the sound of thestrikes is pure, clear, and easily audible, even in the small case of a wristwatch. A practically inaudible
centrifugal governor is responsible for the perfect rhythm of the strike sequence and suppresses theannoying background chatter that is typical of many minute repeaters. And not least, two extra-longcathedral gongs assure the remarkable richness and clarity of the sounds. They are nearly twice aslong as ordinary gongs, so both of them must be coiled around the movement twice – a formidable
challenge for the watchmaker. The relief-engraved slide that is used to actuate the minute repeater
adds aesthetic charisma to the peerless acoustic experience.
The course of time with tourbillon accuracy
The minute repeater derives its timing information from a precision movement with a tourbillon thatguarantees superb rate accuracy. The filigreed mechanism offsets rate deviations in vertical positions,rotates about its own axis once a minute, consists of 69 individual parts, and nonetheless weighs ascant 0.3 grams. The separate rate certificate that accompanies each Ref. 6002 verifies the impressive
rate accuracy of the tourbillon-controlled Patek Philippe movement. Completely assembled and casedup, the caliber's rate fluctuates by no more than -2 to +1 seconds per day.
The perpetual calendar with retrograde date
Patek Philippe perpetual calendars are legendary. This also applies to the Sky Moon Tourbillon Ref.
6002 and its perpetual calendar with the automatic retrograde date. Its hand points to the current dateon a 240° arc from 8 to 4 o'clock. Every day, the date hand advances by one increment and at the endof the month, on the 28th, 29th, 30th, or 31st day automatically jumps back to the 1st day of the newmonth. This function is handled by a patented mechanism with a ratchet wheel and a pawl, which, incontrast to conventional solutions with cam disks, guarantees extremely precise hand alignment. The
mechanism prevents the date hand from bouncing forward to the second or third day on the scale after
it has jumped from the last day of the month to the first. It reliably stops on the first day and is held
there.
Contrary to the Ref. 5002, the other indications of the perpetual calendar are displayed in apertures:the day of the week at 9 o'clock, the leap year cycle at 12 o'clock, the month at 3 o'clock, and the moonContinued 4phases at 6 o'clock. Aperture displays are more complex to build and require more force than handdisplays, but their advantage is faster and more convenient legibility.
Celestial pleasures on the backThe back dial of the Sky Moon Tourbillon Ref. 6002 presents a highly unusual spectacle on its reardial. The night sky of the northern hemisphere rotates beneath a sapphire-crystal glass, depicting theangular motion of the stars and of the moon, the meridian passages of Sirius and of the moon, and thewaxing and waning moon phases. Additionally, two hands from the center indicate sidereal time on a24-hour scale. An elliptical contour surrounds the portion of the nocturnal sky that is visible from aspecific location. These fascinating functions are handled by a highly unique, patented mechanicalmodule. With this Sky-Moon mechanism, Patek Philippe has achieved a nearly incredible degree ofprecision in the astronomical depiction of the heavenly canopy.
A lunar day is defined by the time that elapses between two consecutive passages of the moon acrossa given meridian; on average, it lasts 24 hours, 50 minutes, and 28.328 seconds. One lunation (theperiod of time between two consecutive full moons) has an average duration of 29 days, 12 hours, 44minutes, and 2.82 seconds. A sidereal day is defined as the time between two consecutive passagesof a fixed star (such as Sirius) across a given meridian; its average duration is 23 hours, 56 minutes,and 4.09892 seconds. Sidereal time makes it possible to calculate the geographical longitude of aspecific location.
To assure correct displays, these deviations from mean solar time require appropriate step-up andreduction gear ratios in the going train that transmits the force from the spring barrel to the individual
astronomical indications. Some of these ratios rely on the accuracy of the moon-phase display versus
the sidereal day, others on the accuracy of the sidereal day versus the orbital position of the moon, etc.
Overall, more than 25 trillion (25,000,000,000,000) variations were calculated for the transmission ratio
pairings of the going train. From this incredible number of ratios, Patek Philippe picked the optimal set
that resulted in the smallest possible deviations for all displays. The outcome of the theoreticalcomputations surpassed all expectations:• The deviation for the lunar day is -0.05 seconds per day, -18.385 seconds per year, or -30 minutes
and 38.5 seconds per century.
• For a sidereal day, the deviation is -0.088 seconds per day, -32.139 seconds per year, or -53 minutes
and 33.9 seconds per century.
• For the moon phases, it is -6.51 seconds per lunation.
A paragon of perfection
The manually wound movement is a masterpiece of micromechanical engineering composed of a totalof 686 parts that are lavishly finished by hand. All edges of the steel parts are beveled and each toothof every steel wheel is polished with a rotating hardwood disk by hand, one by one. This degree ofperfection is not an end in itself; it reduces friction at the points where the wheels mesh, thus
contributing significantly to the legendary precision and longevity of Patek Philippe watches. The plate
and the module with the perpetual calendar are finished with a perlage pattern on both sides, and thebridges are decorated with Geneva striping. Due to the number and complexity of the elaborate
processes and stringent rate tests, it takes many months to complete a single movement. The result isContinued 5a flawless caliber that displays the Patek Philippe Seal on its plate – the most prestigious attestation ofquality for top-echelon mechanical movements.
The opus is delivered to its owner in a precious box worthy of being called a treasure chest. It is
crafted from rare Macassar ebony with hand-engraved white-gold decorations and accents in bluelacquer. In addition to the unique timepiece, the case also accommodates two hand-engraved cufflinks
in 18K white gold with blue lacquer fillings.
Patek Philippe's Sky Moon Tourbillon Ref. 6002 is a globally unique timekeeping instrument thatexpands the notion of a grand complication by the aesthetic accolade of a grand creation. It proudly
pays homage to the canton of Geneva which has been the home of haute horlogerie for 500 years andof Patek Philippe for 174 years.

Continued 6

Technical data
Patek Philippe "Sky Moon Tourbillon" Ref. 6002
Movement:Caliber RTO 27 QR SID LU CL
Manually wound mechanical movement. Minute repeater, tourbillon,perpetual calendar with aperture displays and retrograde date, moonphases, sidereal time, angular progression of the moon

Overall diameter:
Height:Number of parts:
Number of jewels:
Power reserve:
Balance:
Tourbillon:

38 mm
12.61 mm686
55
Min. 38 hours – max. 48 hours
Gyromax®
1 revolution per minute; number of parts: 69; overall weight: 0.3 g
Steel cage; tourbillon, balance wheel, and fourth wheel on one axis
21,600 semi-oscillations per hour (3 Hz)
BreguetAdjustable

Frequency:
Balance spring:
Balance spring stud:
Hallmarks:

Patek Philippe Seal, rate accuracy certificate for Patek Philippe tourbillon
watches

Displays:

Front side, dial:
Mean solar time in hours and minutes, perpetual calendar with retrograde
date, day of week, month, leap year cycle, and moon phases
Back side, sky chart:
Sidereal time in hours and minutes, time of meridian passage of Sirius andof the moon, angular progression of the moon, and moon phases.

Minute repeater:

Hour, quarter-hour, and minute strikes on two “cathedral” gongs

Features:Case:

18K white gold with reliefed engraving
Sapphire-crystal glass front and rearDimensions:

Diameter 42.80 mm
Height (crystal to back): 16.25 mm
Height (crystal to lugs): 17.35 mm

Crowns:At 4 o'clock to wind the movement and set the hands for mean solar time,hand-engraved
At 2 o'clock to adjust the sky chart, sidereal time, angular position of themoon, and the moon phase, hand-engraved

Slide:In the case flank to actuate the minute repeater

Continued 7

Correction push pieces:(in the case flank)

Date and day between 11 and 12 o'clock
Month between 3 and 4 o’clock
Moon phase between 5 and 6 o'clock
Day of week between 6 and 7 o’clock

Front side:

Gold dial with blue enamel in champlevé and cloisonné
Railway-track minute scale integrated in the blue champlevé enamel
Applied Roman numerals in white gold
Date numerals and markers, signature lettering, and movement number
painted bright grayHands:

Hours and minutes: leaf-shaped hands in white gold, hand-engraved
Date: slender double-leaf flyback hand in rhodiumed steel

Back side:(sky chart)

Four metallized sapphire-crystal disks
Hours and minutes of sidereal time: white counterbalanced baton handsStrap:

Hand-stitched shiny blue alligator with large square scales and handengraved fold-over clasp in 18K white gold