Pocket watch · Complicated pocket watch

Patek Philippe, The Calibre 89

Partially verified

Source reports this astronomical and astrological pocket watch was created by Swiss manufacturer Patek Philippe to mark its 150th anniversary in 1989. The manufacturer produced four examples of the Calibre 89, integrating 33 complications, 24 hands, and 1,728 individual components. Features described by the source include a 400-year retrograde date display along an arc between ten and two o'clock, a digital leap year cycle indicator, and an Easter Sunday display calibrated from 22 March to 25 April on its sidereal dial. The sidereal dial also incorporates a revolving sapphire crystal celestial disc illustrating 2,800 Northern Hemisphere stars.

Front dial of the yellow gold Calibre 89 pocket watch showing calendar indications, chronograph registers, and moon phase display — Sotheby’s. Rights pending — permission not yet requested. Original source

Catalogue identity

Source: www.sothebys.com
Category: Pocket watch · Complicated pocket watch
Maker / attribution: Patek Philippe
Reference: Calibre 89
Catalogue / lot identifier: Source URL identifies the listing
Source-reported date: Not established
Country: Switzerland

Source-reported attribution and specifications are not independent authentication. A listing does not establish present ownership, current display, availability or permission to reproduce.

Object description

Identity and Production Background

According to the source slideshow from Sotheby's, Swiss watch manufacturer Patek Philippe planned the creation of the Calibre 89 ahead of 1989 to mark the firm's 150th jubilee anniversary. The source notes that four examples were made of this open-faced astronomical and astrological pocket watch.

The movement is reported to incorporate 33 complications and 24 hands across 1,728 components.

Evidence for this section

“Swiss watch manufacturer Patek Philippe left nothing to chance: the firm planned its most extraordinary timepiece well in advance of 1989, the year of its 150th jubilee anniversary.”
“With just four examples made, the Calibre 89 became the world’s most complex mechanical watch”
“Incorporating an enormous 33 complications with 24 hands among 1,728 components, this open-faced astronomical and astrological pocket watch”

Front Dial Layout and Visual Observations

Visual observation shows an open-faced yellow gold pocket watch case fitted with multiple operating slides and pushers along the band. Applied gold Breguet numerals surround the dial perimeter, framing a retrograde date display sector along an arc between ten and two o'clock.

The dial features French day and month calendar apertures ('SAM' and 'FEV') alongside dual digital displays showing year '2010' and leap cycle digit '2'. Subsidiary registers include twin upper subdials and a combined subdial at 6 o'clock containing running seconds, a moon phase aperture, and a Celsius temperature scale.

Evidence for this section

“Open-faced yellow gold pocket watch case fitted with multiple operating slides and pushers along the band.”
“Front dial features applied gold Breguet numerals, retrograde date sector, dual digital display showing year '2010' and leap cycle digit '2'.”
“French day and month calendar apertures ('SAM' and 'FEV').”
“Subsidiary dials include twin upper registers and a combined subdial at 6 o'clock with running seconds, moon phase, and a Celsius temperature scale.”

Source-Reported Sidereal and Astronomical Features

While not shown in the primary photograph, the source describes a reverse sidereal dial with specialized astronomical complications. This includes an Easter Sunday display tracking an arc from 22 March to 25 April governed by a cam requiring replacement every 30 years, and an astronomical sun hand making one annual rotation around the dial to indicate equinoxes, solstices, dates, zodiac signs, and seasons.

The source also states that the sidereal dial incorporates a revolving sapphire crystal disc showing the Milky Way and 2,800 Northern Hemisphere stars as seen from Geneva.

Evidence for this section

“the Calibre 89 follows an arc from 22 March to 25 April on the sidereal dial.”
“A special cam dictating forthcoming Easters must be replaced every 30 years.”
“The watch shows the Milky Way and 2,800 Northern Hemisphere stars as seen from Geneva. They appear on a sapphire crystal disc revolving in an aperture within the sidereal dial that is true to real time.”
“The astronomical sun hand makes one annual rotation around the sidereal dial.”

Open research questions

Which of the four Calibre 89 examples is depicted in the photograph, and what movement and case serial numbers are engraved on it?
What specific gold alloy hallmarks and case maker marks are stamped on the band, slides, and bow?
What are the specific functions and calibrations of the two upper subsidiary dials visible on the front dial?

Source evidence

Recorded claims and source quotations for Patek Philippe, The Calibre 89
Field	Source-reported value	Source quotation
Maker	Patek Philippe	“Swiss watch manufacturer Patek Philippe”
Model	The Calibre 89	“Patek Philippe, The Calibre 89”
Complications count	33 complications	“Incorporating an enormous 33 complications with 24 hands among 1,728 components”
Case design	Open-faced astronomical and astrological pocket watch	“open-faced astronomical and astrological pocket watch”
Retrograde date	Arc from 10 o'clock to 2 o'clock	“an arc from ten o’clock to two o’clock displays the date”
Easter indicator	Arc from 22 March to 25 April	“follows an arc from 22 March to 25 April on the sidereal dial”
Total component count	1,728 components	“among 1,728 components”
Total hands count	24 hands	“with 24 hands”
Celestial disc star count	2,800 Northern Hemisphere stars	“The watch shows the Milky Way and 2,800 Northern Hemisphere stars as seen from Geneva.”
Sun hand rotation period	One annual rotation	“The astronomical sun hand makes one annual rotation around the sidereal dial.”
Easter cam replacement interval	Every 30 years	“A special cam dictating forthcoming Easters must be replaced every 30 years.”

Visible details

Open-faced yellow gold pocket watch case fitted with multiple operating slides and pushers along the band.
Front dial features applied gold Breguet numerals, retrograde date sector, dual digital display showing year '2010' and leap cycle digit '2'.
French day and month calendar apertures ('SAM' and 'FEV').
Subsidiary dials include twin upper registers and a combined subdial at 6 o'clock with running seconds, moon phase, and a Celsius temperature scale.

Research qualifications

Specific movement and case serial numbers are not recorded in the source text.
The reverse sidereal dial described in the article is not shown in this photograph.

Photograph identity and source facts were screened before import; rights clearance remains pending.

Consulted source

Starstruck: Patek Philippe’s Calibre 89 | Sotheby’s

Reviewed 2026-10-21 · Record 174929e3a6

Terms in this record

Glossary explanations for terms named in this object’s record.