GENEVA · EST. 1839 · HAUTE HORLOGERIE

PATEK
PHILIPPE SA

THE MOST PRESTIGIOUS TIMEPIECES IN THE WORLD

Two Summits of Horology

The story of the two most complicated watches this maison — or anyone — ever built: the Henry Graves Supercomplication of 1933, drafted entirely by hand and memory, and the Calibre 89 of 1989, the first grand complication designed with a computer. What follows is the engineering between them.

193324 COMPLICATIONS · ~920 PARTS 198933 COMPLICATIONS · 1,728 PARTS

The Breguet No. 160 Marie-Antoinette grand complication pocket watch — BREGUET No. 160 · "MARIE-ANTOINETTE" · ORDERED 1783 The most famous complicated watch in history — and the legend the Graves commission set out to surpass. L.A. Mayer Museum, Jerusalem.

PLATE 01 — THE VAULT

Four centuries of portable time

The lineage both summits descend from — six museum specimens, from the first watches ever made to the railroad chronometers of the industrial age.

Melanchthon's spherical pomander watch, 1530

Melanchthon's Pomander Watch

NUREMBERG · 1530 · ATTR. PETER HENLEIN'S CIRCLE
ONE OF THE OLDEST WATCHES ON EARTH · WALTERS ART MUSEUM

Baroque Pocket Watch

17TH CENTURY · VERGE & FUSÉE ERA
WHEN THE WATCH BECAME JEWELLERY

Breguet No. 160 "Marie-Antoinette"

PARIS · ORDERED 1783 · FINISHED 1827
THE FIRST LEGENDARY GRAND COMPLICATION · L.A. MAYER MUSEUM

Harrison's H4 Marine Chronometer

LONDON · 1759 · SOLVED THE LONGITUDE PROBLEM
NATIONAL MARITIME MUSEUM, GREENWICH

Arnold & Dent Pocket Chronometer

LONDON · 19TH CENTURY
PRECISION HOUSE OF THE ROYAL OBSERVATORY ERA

Waltham Model 1883

MASSACHUSETTS · c. 1899 · 15 JEWELS, HUNTING CASE
THE AMERICAN INDUSTRIAL WATCH AT ITS PEAK

PHOTOGRAPHS · WIKIMEDIA COMMONS, WALTERS ART MUSEUM & CONTRIBUTING PHOTOGRAPHERS · OPEN LICENSES

PLATE 02 — CATALOGUE RAISONNÉ

Four entries, examined

Breguet No. 160 "Marie-Antoinette"

PARIS · 1783–1827 · GOLD, SAPPHIRE ROLLERS

Ordered for the Queen with no limit on cost or time, finished 44 years later — after both the Queen and Breguet himself were dead. Perpetual calendar, equation of time, minute repeater, thermometer, jumping hours. Stolen from the L.A. Mayer Museum in 1983; recovered a quarter-century later.

Harrison's H5 Marine Chronometer

LONDON · 1770 · TESTED BY KING GEORGE III

Harrison's final timekeeper, built at 77 to prove H4 was no accident. The King trialled it personally at his private observatory — it kept time to a third of a second a day, and Parliament finally paid the Longitude reward. Precision timekeeping's founding document, in brass.

Geneva enamel watch with allegories of Peace and Victory

Enamel Watch, Allegories of Peace & Victory

GENEVA · AYME DE COMBE · WALTERS ART MUSEUM

The other half of Geneva's inheritance: the watch as miniature painting. Fired enamel over gold, a technique the city's cabinotiers perfected centuries before Patek Philippe was founded on the same streets — and one the maison's rare handcraft pieces still practice today.

Hunting-Case Pocket Watch

19TH CENTURY · SAVONNETTE FORM

The spring-loaded lid — snapped open with the crown, born so a rider could check the hour one-handed mid-hunt. This silhouette is the body both summits inhabit: the Graves and the Calibre 89 are, in the end, the most extraordinary pocket watches ever made.

PLATE 03 — THE MAISON, OLD TO NEW

One house, 187 years

Patek Philippe itself, from the founder's era to the modern wrist — every photograph a genuine piece, from museum collections and open archives.

Adrien Philippe

CO-FOUNDER · PORTRAIT OF 1875
INVENTOR OF THE KEYLESS WINDING CROWN

Patek Philippe watch of 1888 in gold, pearl, enamel and ruby

Patek Philippe & Co., 1888

GOLD · PEARL · ENAMEL · RUBY
PEABODY ESSEX MUSEUM

The Masonic Watch, 1897

COMMISSIONED SYMBOLIC DIAL
THE BESPOKE TRADITION THE GRAVES INHERITED

Golden Ellipse

DESIGN OF 1968 · GOLDEN-RATIO CASE
THE MODERN CLASSIC

Contemporary Wristwatch

THE HOUSE STYLE TODAY
PHOTOGRAPH · WIKIMEDIA COMMONS

Diagram of the Patek Philippe Gyromax balance

The Gyromax Balance

PATEK'S PATENTED REGULATOR
THE SAME BALANCE BEATING INSIDE THE CALIBRE 89

PHOTOGRAPHS · WIKIMEDIA COMMONS & CONTRIBUTING PHOTOGRAPHERS · OPEN LICENSES · NOT AFFILIATED WITH PATEK PHILIPPE SA

PLATE 04 — NEW YORK, 1925

The Commission

Henry Graves Jr., a New York banker, asked Patek Philippe for the most complicated watch in the world. Three years of research and five years of construction followed. The watch was delivered on 19 January 1933.

It held the title of the world's most complicated timepiece for fifty-six years — and remains the most complicated watch ever built with no computer involved at any stage.

Commissioned1925
Delivered19 JAN 1933
Complications24
Components~920
Case diameter70 MM
Movement no.198.385

Original drafting study — double-dial disposition after the Graves layout

Original study — ratio arithmetic of the kind worked on paper before 1980

PLATE 05 — METHOD

Drawn from memory
and paper

Every wheel count, every lever throw, every spatial clearance inside the Graves watch was resolved by hand — mathematical calculation on paper, the accumulated memory of master watchmakers, and physical prototyping in metal.

There was no way to test a mechanism except to make it. A misjudged tolerance meant beginning the part again. This is the constraint that defines the entire pre-1980 tradition: the design existed nowhere but on paper and in the maker's head until it existed in brass.

It remains the most complicated watch ever built with no computer involved at any stage of its design.

PLATE 06 — THE INTERVAL

Fifty-six years unbeaten

No watchmaker surpassed the Graves watch for over half a century. When the record finally fell, it fell to the same house — and to a fundamentally different way of working.

1925

Graves commissions the watch. Three years of research begin.

1933

Delivered 19 January. 24 complications, ~920 parts, all by hand.

1980

Philippe Stern sets the challenge: invent complications never made before.

1983

Two Swiss patents filed — the Easter cam and the secular calendar.

1989

Calibre 89 completed for the 150th anniversary. 33 complications.

2015

Surpassed at last — by a 57-complication pocket watch from a rival house.

5 YEARSResearch & calculation

4 YEARSMaking & assembly

4Examples built

88.2 MMCase diameter

PLATE 07 — THE ENGINEERING LEAP

Memory gives way
to the model

For the Calibre 89, Patek Philippe used computer-aided design on a grand complication for the first time. The finishing and assembly remained strictly by hand — but the geometry no longer had to be discovered in metal.

CAD let engineers calculate spatial tolerances precisely enough to introduce mechanisms that could not realistically have been modelled physically without starting the entire movement again — among them the tourbillon escapement and a multi-functional crown.

Design methodCAD + HAND FINISHING
Research phase1980–1985
Construction1985–1989
Movement mass600 G MAILLECHORT
Jewels126

Original wireframe study — the drawing type that replaced the paper draft

Original sectional study — four tiers distributed across three plates

PLATE 08 — ARCHITECTURE

Not one movement
but four

The Calibre 89 is too complex to resolve on a single plane. Its mechanisms are separated into four tiers distributed across three plates, working in concert — powered by three mainspring barrels serving the going train and calendar, the alarm, and the striking work.

Plates3
Tiers4
Mainspring barrels3
Bridges61
Wheels184
Screws332

The second plate alone carries the sidereal dial's entire world: sidereal time, the seasons, solstices and equinoxes, the zodiac, sunrise and sunset, the equation of time, the date of Easter, and the star chart.

PLATE 09 — THE REGULATOR

A cage against gravity

The Graves watch has no tourbillon. The Calibre 89 does — an escapement mounted in a rotating carriage so that positional errors caused by gravity average out over each revolution.

Where Breguet's original turns once a minute, this cage turns at 0.5 rpm — one revolution every two minutes. Adding it to an already-full movement was precisely the kind of intervention CAD made possible without restarting the design.

Cage rotation0.5 RPM
Period120 SECONDS
EscapementSTRAIGHT-LINE LEVER
BalanceGYROMAX
HairspringBLUED-STEEL BREGUET
Adjusted to5 POSITIONS · HEAT · COLD

Original schematic — rotating carriage, Gyromax balance, Breguet overcoil

Original schematic after the crenellated Easter cam principle

PLATE 10 — THE HARDEST COMPLICATION

The date of Easter

Easter is a moveable feast: the first Sunday after the first full moon following the vernal equinox. It is the intersection of a solar calendar and a lunar one, and it follows no repeating annual pattern a gear train can simply divide.

Patek's solution was not calculation but memory in metal — a crenellated cam carrying thirty bearings, each cut at a radius corresponding to the Easter date of one specific year. The movement advances the cam one step per year; a feeler reads the radius and drives a hand across a scale from 22 March to 25 April.

When the thirtieth bearing is reached, a raised step sends the hand to a marker signalling that the cam is spent. A second cam, covering the following twenty-nine years, was supplied with each watch.

SWISS PATENT CH 649 673 · FILED 8 MARCH 1983

PLATE 11 — THE CENTURY CORRECTION

The calendar that
knows 1582

A standard perpetual calendar knows the months, the leap years, and the 29th of February. It does not know that the Gregorian reform made century years ordinary — 1700, 1800, 1900 were not leap years; 2000 was, because it divides by 400.

Left uncorrected, that blind spot costs three days every four centuries. The Calibre 89 carries a secular perpetual calendar with a century leap-year correction built into the mechanism, so the error never accrues and the owner is never asked to intervene.

SWISS PATENT CH 653 841 · FILED 7 OCTOBER 1983 · REGISTERED 1986

Original diagram — the Gregorian exception the mechanism encodes

PLATE 12 — THE DIFFERENCE

Twenty-four absorbed.
Nine invented.

The Calibre 89 takes up the entire feature set of the Graves watch — perpetual calendar, grande and petite sonnerie, split-seconds chronograph, equation of time, celestial chart — and adds nine further indications, several of which had never been built into a portable timepiece before.

Easter

The moveable feast, computed by a thirty-year crenellated cam. A first in horology.

Secular

Century leap-year correction — the calendar survives 2100 untouched.

Tourbillon

A rotating escapement carriage at 0.5 rpm. Absent from the Graves entirely.

Thermometer

A mechanical temperature indication integrated into the mean-time dial.

Star chart

2,800 stars and the Milky Way on a revolving sapphire disc, drawn for Geneva.

Crown

A multi-functional crown system controlling several mechanisms from one axis.

PLATE 13 — THE MACHINES THEMSELVES

What the case conceals

The finished dial is diplomacy; the movement is the truth. Three specimens opened — the mechanics every schematic in this presentation describes.

The movement of Harrison's H4 chronometer

Inside Harrison's H4

1759 · THE ENGRAVED MOVEMENT THAT WON LONGITUDE
NATIONAL MARITIME MUSEUM · PHOTO M. PEEL

Longines 4 Grand Prix pocket watch movement

Longines "4 Grand Prix" Movement

SAINT-IMIER · EARLY 20TH CENTURY
GEAR TRAIN, BALANCE & REGULATOR EXPOSED

Gold Savonnette

THE CLASSIC HUNTER-CASE POCKET WATCH
THE SILHOUETTE BOTH SUMMITS INHERITED

EVERY WHEEL COUNT ON THESE PLATES WAS ONCE SOMEONE'S PAPER ARITHMETIC — UNTIL 1980, WHEN IT BECAME A MODEL

PLATE 14 — THE LEDGER

Summit against summit

Metric	Henry Graves Supercomplication	Calibre 89
Year	1933	1989
Complications	24	33
Components	~920	1,728
Total weight	~0.5 kg	1.1 kg
Case diameter	70 mm	88.2 mm
Movement layout	Traditional double-faced	4 tiers · 3 plates · 3 barrels
Regulator	Conventional escapement	Tourbillon, 0.5 rpm
Design method	Memory · paper · prototype	CAD + hand finishing
Examples built	1	4

24Hands

332Screws

184Wheels

61Bridges

415Pins

126Jewels

Original schematic — four-tier architecture of the Calibre 89

The last drawn by hand.
The first drawn by machine.

Between them, fifty-six years and nine complications — but the real distance is a change in what a watchmaker could know before cutting metal.

FIGURES: SOTHEBY'S · ANTIQUORUM · SWISS PATENT REGISTER CH 649 673 & CH 653 841
ALL SCHEMATICS ON THESE PLATES ARE ORIGINAL DRAWINGS PREPARED FOR THIS PRESENTATION
NOT AFFILIATED WITH OR ENDORSED BY PATEK PHILIPPE SA

POWERED BY BENJAMIN STAFFORD