Skip to content
The Encyclopedia of Horology

Wristwatch · Annual calendar chronograph

Patek Philippe Ref. 5960P Annual Calendar Chronograph

Partially verified

This Patek Philippe Ref. 5960P is a platinum self-winding wristwatch featuring an annual calendar and a flyback chronograph. The watch, bearing movement number 3505772 and case number 4457410, was sold in May 2010. The case measures 41 mm in diameter and 14 mm in thickness, incorporating a concave bezel, correctors in the band, and a transparent screw-down case back. A Top Wesselton diamond is set between the lugs at the 6 o'clock position. The anthracite dial displays applied white gold faceted baton indexes, luminous dots, and guilloche silver subsidiary dials for chronograph totalizers and a power reserve sector. Apertures indicate days of the week, date, months, and day/night. It is powered by the rhodium-plated Caliber CH 28-520/521, featuring the Seal of Geneva, 40 jewels, and a 21K gold rotor. It is offered with its original fitted box, Certificate of Origin, setting pin, and instruction booklet.

The Patek Philippe Ref. 5960P wristwatch displayed within its fitted box, including the Certificate of Origin and setting pin.
The Patek Philippe Ref. 5960P wristwatch displayed within its fitted box, including the Certificate of Origin and setting pin. — Antiquorum. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
catalog.antiquorum.swiss
Category
Wristwatch · Annual calendar chronograph
Maker / attribution
Patek Philippe
Reference
5960 P-001
Catalogue / lot identifier
201
Source-reported date
2010
Source-reported place
Switzerland
Source-reported serial
4457410

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 two-body solid platinum case with a polished finish. The design incorporates a concave bezel and lugs, with correctors integrated into the case band to adjust the annual calendar functions. A distinct detail is the inclusion of a Top Wesselton diamond set into the case between the lugs at the 6 o'clock position. The case back is screw-down with a transparent sapphire crystal window, allowing visibility of the movement.

The dial is colored in anthracite and features applied white gold faceted baton indexes paired with luminous dots. The subsidiary dials, which handle the 30/60-minute and 12-hour chronograph functions, are finished in silver guilloché. The dial also houses a power-reserve sector and three apertures for the day, date, and month, alongside a day/night indicator. The hours and minutes are tracked by white gold feuille luminous hands.

Evidence for this section
  • “Two-body, solid, polished, concave bezel and lugs, Top Wesselton diamond set between the lugs at 6, correctors in the band, screw-down transparent case back”
  • “Anthracite with applied white gold faceted baton indexes and luminous dots, outer minute and 1/5th seconds divisions, guilloche silver subsidiary dials”

Movement and Mechanical Details

The watch is powered by the Patek Philippe Caliber CH 28-520/521. This rhodium-plated movement is stamped with the Seal of Geneva quality mark and finished with fausses cotes decoration. The movement contains 40 jewels and employs a straight-line lever escapement. Accuracy is regulated by a Gyromax balance, which is adjusted for heat, cold, isochronism, and five positions.

Further technical features include a self-compensating freesprung Breguet balance spring and a shock absorber system. The self-winding mechanism is driven by a 21K gold rotor that utilizes an oil-free ball bearing system containing zirconium balls.

Evidence for this section
  • “Cal. CH 28-520/521, stamped with the Seal of Geneva quality mark, rhodium-plated, fausses cotes decoration, 40 jewels”
  • “Gyromax balance adjusted to heat, cold, isochronism and 5 positions, shock absorber, self-compensating freesprung Breguet balance spring, 21K gold rotor with oil-free ball bearing and zirconium balls.”

Provenance and Accompanying Documentation

The watch was sold on May 12th, 2010. It is presented as a complete set, accompanied by its original fitted box and the Certificate of Origin. Also included with the object are the setting pin, which is necessary for manipulating the calendar correctors, and the instruction booklet.

The auction description reports a grading of AAA, with the case and dial described as 'as new'.

Evidence for this section
  • “. Accompanied by the original fitted box, Certificate of Origin, setting pin and instruction booklet.”
  • “Grading System Grade: AAA Excellent Case: 1 As new Movement: 1* As new Overhaul recommended, at buyer's expense”

Open research questions

  • What is the specific date of manufacture for this watch if different from the sale date?
  • Has the watch received any servicing or case polishing since the 2010 sale date?

Source evidence

Recorded claims and source quotations for Patek Philippe Ref. 5960P Annual Calendar Chronograph
FieldSource-reported valueSource quotation
MakerPatek Philippe, Genève“Patek Philippe, Genève”
Reference5960 P-001“Ref. 5960 P-001”
Case Number4457410“case No. 4457410”
Movement Number3505772“No. 3505772”
Case MaterialPlatinum“platinum and diamond wristwatch”
Dimensions41 mm diameter, 14 mm thickness“Diam. 41 mm. Thickness 14 mm.”
MovementCal. CH 28-520/521“Cal. CH 28-520/521”
Sold DateMay 12th, 2010“Sold May 12th, 2010.”

Visible details

  • Top Wesselton diamond set at 6 o'clock between lugs
  • Anthracite dial with luminous white gold feuille hands
  • Transparent screw-down case back
  • Brown leather strap with deployant clasp

Research qualifications

  • Condition report suggests overhaul is recommended at buyer's expense
  • The specific clarity grade of the Top Wesselton diamond is not stated

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

Terms in this record

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

Other annual calendar chronograph records