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The Encyclopedia of Horology

Wristwatch · Astronomic wristwatch

Patek Philippe Celestial Reference 5102PR

Partially verified

This Patek Philippe Celestial wristwatch, reference 5102PR, features a three-body case constructed of platinum and 18K pink gold. Measuring 43 mm in diameter and 10 mm in thickness, the case exhibits a polished finish, a stepped curved bezel, and a case band embossed with the Calatrava pattern. The watch includes concave lugs with screwed-bars and sapphire crystals on both the front and the transparent screw-down case back. It is powered by the self-winding Caliber 240/165, which is rhodium-plated and features 45 jewels, a 22K yellow gold micro-rotor, and a straight-line lever escapement with a Gyromax balance. The blue dial displays a nocturnal sky chart of the Northern Hemisphere, moon phases, moon orbit, and the meridian passage of Sirius. It is accompanied by a Certificate of Origin, winding box, additional strap, and 18K pink gold hardware.

Front view of the Patek Philippe Celestial Reference 5102PR with the accompanying Certificate of Origin visible in the background.
Front view of the Patek Philippe Celestial Reference 5102PR with the accompanying Certificate of Origin visible in the background. — Antiquorum. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
catalog.antiquorum.swiss
Category
Wristwatch · Astronomic wristwatch
Maker / attribution
Patek Philippe
Reference
5102PR
Catalogue / lot identifier
102
Source-reported date
2010
Source-reported place
Switzerland
Source-reported serial
4492399

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

Case and Dial Construction

The watch features a complex three-body case design combining platinum and 18K pink gold. It measures 43 mm in diameter and 10 mm in thickness. The exterior aesthetics include a stepped curved bezel and a case band embossed with the manufacturer's signature Calatrava pattern. The case is equipped with concave lugs secured by screw-bars and sapphire crystals on the display back and front.

The blue dial serves as an astronomic display, featuring a nocturnal sky chart of the Northern Hemisphere. This intricate construction utilizes three superimposed sapphire crystal disks to represent the sky, moon phases, and moon orbit. The dial includes gold star constellations, cardinal direction markers, and Roman hour graduations around the periphery, with white skeletonized feuille hands indicating the time.

Evidence for this section
  • “Three-body, solid, polished, stepped curved bezel, case band embossed with Calatrava pattern”
  • “Blue sky chart with gold star constellations and North/South/East/West divisions, made from 3 super-imposed sapphire crystal disks”

Movement and Functionality

Inside the case resides the self-winding Caliber 240/165 movement. It features rhodium-plating, fausses cotes decoration, and a 22K yellow gold micro-rotor. The escapement is a straight-line lever type utilizing a Gyromax balance adjusted for heat, cold, isochronism, and five positions. The movement incorporates a shock absorber and a self-compensating free-sprung flat balance spring, housing 45 jewels in total.

Functionally, the watch is operated via two crowns. The crown at the 2 o'clock position is utilized for winding and setting the time. The crown at the 4 o'clock position provides adjustments for the sky chart, the lunar orbit, and the moon phases.

Evidence for this section
  • “Cal. 240/165, stamped with the Patek Philippe Seal hallmark, rhodium-plated, fausses cotes decoration, 45 jewels”
  • “The crown at 2 adjusts the time and to wind the watch, the one at 4 adjusts the sky, lunar orbit and moon phases.”

Condition and Included Accessories

The dial is described as being in as-new condition, while the case is noted as very good with slight scratching.

The object is sold as part of a set that includes the original fitted winding box and an additional box. Also included in the sale are the Certificate of Origin and a leather folder containing technical and instruction documentation. The timepiece is completed by an additional strap and 18K pink gold Patek Philippe buckle, with a matching deployant clasp attached to the watch.

Evidence for this section
  • “Grading System Grade: Case: 2-8 Very good Slightly scratched Movement: 1* As new Overhaul recommended, at buyer's expense”
  • “Accompanied by the original fitted winding box, additional box, Certificate of Origin and a leather folder with technical and instruction information”

Open research questions

  • What is the specific maintenance history for this movement since the 2010 sale?
  • Are the sapphire crystal disks prone to specific alignment issues requiring factory service?

Source evidence

Recorded claims and source quotations for Patek Philippe Celestial Reference 5102PR
FieldSource-reported valueSource quotation
Reference5102PR“Ref. 5102PR”
Case MaterialPlatinum and 18K pink gold“platinum and 18K pink gold wristwatch”
MovementCaliber 240/165“Cal. 240/165, stamped with the Patek Philippe Seal hallmark”
Sold DateAugust 14, 2010“Sold on August 14, 2010.”
Case Serial4492399“case No. 4492399”
Diameter43 mm“DIAM. 43 mm.”
Movement Serial5512738“No. 5512738”
ComplicationsMean time indication, nocturnal sky chart, moon phases, moon orbit, meridian passage of Sirius“mean time indication, nocturnal sky chart of the Northern Hemisphere, moon phases and moon orbit, time of the meridian passage of Sirius and moon”

Visible details

  • Case band embossed with Calatrava pattern
  • Blue sky chart composed of three superimposed sapphire disks
  • Two crowns positioned at 2 and 4 o'clock
  • Skeletonized feuille hands

Research qualifications

  • Condition report indicates minor scratching on the case
  • The movement is listed as needing an overhaul

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

Consulted source

PATEK PHILIPPE REF. 5102 CELESTIAL PLATINUM AND PINK GOLD Patek Philippe, Genève, Celestial, No. 5512738, case No. 4492399, Ref. 5102PR. Sold on August 14, 2010. Very fine and unusual, astronomic, self-winding, platinum and 18K pink gold wristwatch with mean time indication, nocturnal sky chart of the Northern Hemisphere, moon phases and moon orbit, time of the meridian passage of Sirius and moon with an 18K pink gold Patek Philippe deployant clasp. Accompanied by the original fitted winding box, additional box, Certificate of Origin and a leather folder with technical and instruction information, additional strap and 18K pink gold Patek Philippe buckle.

Reviewed 2026-10-26 · Record e48748a263

Terms in this record

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

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