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Patek Philippe Annual Calendar Chronograph

ProbableCredible evidence exists but classification is not fully established.

Record status

Individual type · partial

Period

2009

Maker / issuer

Patek Philippe

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.

Evidence at a glance

Linked sources
1
Photograph views
1
Catalogue references
0

Counts describe this entry’s documentation, not authenticity, rarity or completeness. Photographs may show one specimen; check each caption and licence.

Technical characteristics

Type
Annual calendar chronograph
Jewels
40 rubies
Calibre
CH 28-520 IRM QA 24H
Case Diamond
1 diamond, approx. 0.02 ct
Case Diameter
40.5 mm
Case Material
950 platinum
Movement Number
3504714/4472102
Reference Number
5960P-001
Maker / attribution
Patek Philippe

Design

Visible features
• 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.
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.
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.
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.

Identification

Reference
5960P-001
Serial number
3504714/4472102
Source note
Facts transcribed from the linked source listing or collection record. Attribution and specifications are source-reported and have not been independently authenticated.

Catalogue references

No catalogue numbers recorded. Numbers are only published once transcribed from a verified edition of a standard catalogue — they are never inferred.

Research required

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