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The Encyclopedia of Horology

Wristwatch · Annual calendar chronograph

Patek Philippe Annual Calendar Chronograph

Partially verified

This Patek Philippe Annual Calendar Chronograph, reference 5960P-001, dates to 2009 and is powered by the automatic calibre CH 28-520 IRM QA 24H with 40 rubies. The 40.5 mm case is made from hallmarked 950 platinum and features a single diamond set into the case. It incorporates an annual calendar displaying the day, date, and month via apertures, alongside a flyback chronograph, a 48-hour power reserve indicator, and recessed corrector pushers. The watch is fitted with an alligator leather strap and a hallmarked 950 platinum folding clasp.

Direct dial view of the Patek Philippe 5960P-001 platinum annual calendar chronograph on a leather strap
Direct dial view of the Patek Philippe 5960P-001 platinum annual calendar chronograph on a leather strap — Wettmann. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
www.invaluable.com
Category
Wristwatch · Annual calendar chronograph
Maker / attribution
Patek Philippe
Reference
5960P-001
Catalogue / lot identifier
195
Source-reported date
2009
Country
Not established
Source-reported serial
3504714/4472102

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 External Construction

The timepiece features a 950 platinum case measuring 40.5 mm in diameter, described as hallmarked. The case includes a single diamond, noted as approximately 0.02 ct, and recessed corrector pushers utilized for adjusting the day, date, and month displays.

The watch is fitted with an alligator leather strap and a hallmarked 950 platinum folding clasp. The strap is recorded as 17 cm in length and adjustable, with the source noting heavy wear marks.

Evidence for this section
  • “Gehäuse 950 Platin, punziert, 1 Diamant im Gehäuse, ca. 0,02 ct, Durchmesser 40,5 mm”
  • “eingelassene Korrektor-Drücker zur Verstellung von Tag, Datum und Monat”
  • “Original-Armband, Alligatorleder*”
  • “Original-Faltschließe, 950 Platin, punziert, Länge 17 cm, verstellbar”
  • “Armband mit starken Tragespuren”

Dial and Complications

The dial displays month and date information via an annual calendar mechanism. The watch also incorporates a 48-hour power reserve indicator and a flyback chronograph function.

The source observes that the central seconds hand is not in a centered position.

Evidence for this section
  • “Monats- und Datumsanzeige”
  • “48h-Gangreserveanzeige”
  • “Flyback-Funktion”
  • “Zentralsekundenzeiger nicht mittig”

Mechanism and Documentation

The watch is powered by the automatic calibre CH 28-520 IRM QA 24H, containing 40 rubies. The movement number is listed as 3504714/4472102. The auction house states the functionality was tested by their master watchmaker.

Accompanying items include the original box, outer packaging, and papers. The outer packaging is described as partially faded, and the box is reported to be heavily discoloured inside.

Evidence for this section
  • “Cal. CH 28-520 IRM QA 24H, 40 Rubine”
  • “Werk-Nr. 3504714/4472102”
  • “Zustand und Funktionalität durch unseren Uhrmachermeister geprüft”
  • “Umverpackung gut, partiell leicht ausgeblichen, Box befriedigend, innen stark verfärbt”

Open research questions

  • What is the technical cause of the central seconds hand misalignment?
  • Does the 'heavy wear' on the alligator strap impact the security of the platinum clasp?
  • What specifically constitutes the 'satisfactory' condition of the box beyond the reported interior discoloration?

Source evidence

Recorded claims and source quotations for Patek Philippe Annual Calendar Chronograph
FieldSource-reported valueSource quotation
Reference Number5960P-001“Ref.-Nr. 5960P-001”
CalibreCH 28-520 IRM QA 24H“Cal. CH 28-520 IRM QA 24H”
Movement Number3504714/4472102“Werk-Nr. 3504714/4472102”
Case Material950 platinum“Gehäuse 950 Platin”
Case Diameter40.5 mm“Durchmesser 40,5 mm”
Case Diamond1 diamond, approx. 0.02 ct“1 Diamant im Gehäuse, ca. 0,02 ct”
Jewels40 rubies“40 Rubine”
Year2009“Jahr 2009”
Total WeightApproximately 145.5 g“Gesamtgewicht ca. 145,5 g”

Visible details

  • Dark grey sunburst dial with three calendar apertures positioned between 10 and 2 o'clock.
  • Monocounter chronograph register located at 6 o'clock featuring concentric scales and a small red hand.
  • Two round chronograph pushers flanking a fluted winding crown on the right side of the platinum case.
  • Brown alligator leather strap with contrast stitching attached to polished lugs.

Research qualifications

  • The source notes that the central seconds hand is not centered.
  • The source notes heavy wear marks on the strap, as well as an interiorly discoloured box.
  • Movement condition is reported as tested by the house's master watchmaker without an independent technical assessment.

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

Consulted source

Sold at Auction: Patek Philippe Annual Calendar Chronograph

Reviewed 2026-10-26 · Record 64ce6222ee

Terms in this record

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