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The Encyclopedia of Horology

Wristwatch · Annual calendar wristwatch

Patek Philippe Advanced Research Annual Calendar Ref. 5450P-001

Partially verified

The Patek Philippe Advanced Research Annual Calendar, reference 5450P-001, is a limited edition wristwatch produced in a series of approximately 300 pieces. It features a polished platinum round case measuring 39mm with a diamond set between the lugs at 6 o'clock. The watch is powered by the 34-jewel Caliber 324/268 automatic movement, numbered 3900169, which incorporates the brand's proprietary Silinvar Spiromax balance spring and a silicon Pulsomax escape wheel. The salmon pink dial displays applied black baton indices, Arabic numeral quarters, subsidiary dials for day and month, a date aperture at 6 o'clock, power reserve indication, and a moon phase aperture. Functions are controlled via four quick-set buttons integrated into the case band. The watch is presented on a brown alligator leather strap with a signed platinum folding clasp and was originally purchased in March 2009.

Patek Philippe Advanced Research Annual Calendar Ref. 5450P-001 with its accompanying documentation.
Patek Philippe Advanced Research Annual Calendar Ref. 5450P-001 with its accompanying documentation. — Bonhams (via Invaluable). Rights pending — permission not yet requested. Original source

Catalogue identity

Source
www.invaluable.com
Category
Wristwatch · Annual calendar wristwatch
Maker / attribution
Patek Philippe
Reference
5450P-001
Catalogue / lot identifier
47
Source-reported date
Purchased 14th March 2009
Source-reported place
Switzerland
Source-reported serial
4429188

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

The wristwatch is housed in a polished round case constructed of platinum. The design includes quick-set adjustment buttons positioned on the case band at the 2, 4, 8, and 10 o'clock positions. A distinguishing feature of the case is a single diamond set between the lugs at the 6 o'clock position. The reverse of the case features a screw-down exhibition back equipped with a magnifying element to view the movement.

The dial is finished in salmon pink and features applied black baton hour markers, with Arabic numerals used for the quarters. Time is indicated via black leaf-shaped hands with luminous inserts. The layout includes a black outer minute track with luminous dots at five-minute intervals. Specific complications include subsidiary dials for day and month at the 3 and 9 o'clock positions, a date aperture located at 6 o'clock, a moon phase display positioned above the date, and a power reserve indicator at 12 o'clock.

Evidence for this section
  • “Polished round, screw down exhibition back with magnification, quick set buttons in the band at 2, 4, 8 and 10, diamond set between the lugs at 6”
  • “Salmon pink, applied black baton hour markers with Arabic numeral quarters, black outer minute track with luminous dot 5 minute markers, subsidiary dials at 3 and 9 for day and month, date aperture at 6, power reserve indication at 12, moon phase indication above 6”

Movement and Technology

The watch utilizes the 34-jewel Caliber 324/268 automatic movement. This movement is part of the manufacturer's Advanced Research program, which introduced technological developments including the Pulsomax escapement, reported to be the first entirely in-house escapement developed by the firm. The movement also employs the proprietary Silinvar and Spiromax balance spring components.

The integration of these specific materials and designs is documented to have increased the power reserve from 45 to 60 hours compared to previous models. The movement is fitted with a gold rotor and is stamped with the Seal of Geneva, confirming its adherence to specific finishing and construction standards. The movement number is recorded as 3900169.

Evidence for this section
  • “34-jewel Cal.324/268 automatic, Silinvar® Spiromax® balance spring, silicon Pulsomax® escape wheel, gold rotor, stamped with the Seal of Geneva, No.3900169”
  • “It features the first entirely in-house escapement for Patek Philippe known as the Pulsomax®.”

Provenance and Condition

This reference was launched in 2008 as the third project under the manufacturer's Advanced Research program. Production was limited to approximately 300 units, and it represents the first model in this series to be produced in platinum. The watch was purchased by its previous owner on March 14, 2009. It is accompanied by a Patek Philippe box, outer card, Certificate of Origin, and associated brochures.

The auction house reports that the movement runs when powered and characterizes the dial, hands, and glass as being in good condition. The case exhibits light surface scratches throughout, with several small nicks present on the bezel. The strap is described as lightly used, and the clasp shows surface scratches in some areas. It is noted that the strap is subject to CITES restrictions regarding its export from the United Kingdom.

Evidence for this section
  • “Production of the 5450 was limited to approximately 300 pieces and was the first of the Advanced Research models to be executed in platinum.”
  • “Case: Light surface scratches throughout, several small nicks to bezel”

Open research questions

  • Does the movement maintain its original silicon components following historical service intervals?
  • What is the specific production number within the 300-piece limited series for this individual case number?

Source evidence

Recorded claims and source quotations for Patek Philippe Advanced Research Annual Calendar Ref. 5450P-001
FieldSource-reported valueSource quotation
MakerPatek Philippe“Patek Philippe.”
Reference5450P-001“Ref: 5450P-001”
Case Number4429188“No.4429188”
Movement Number3900169“No.3900169”
EscapementSilicon Pulsomax“silicon Pulsomax® escape wheel”
Movement FeaturesSeal of Geneva“stamped with the Seal of Geneva”
Case MaterialPlatinum“platinum automatic annual calendar wristwatch”

Visible details

  • Diamond set into the case between the lugs at the 6 o'clock position
  • Quick-set buttons located on the sides of the platinum case
  • Salmon pink dial with subsidiary day and month displays

Research qualifications

  • Condition of individual internal components not verified as original by the auction house
  • Timekeeping accuracy not tested or guaranteed

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

Consulted source

Patek Philippe. A fine, rare and innovative Limited Edition platinum automatic annual calendar wristwatch with moon phase and power reserve indication Advanced Research Annual Calendar, One of 300, Ref: 5450P-001, Purchased 14th March 2009

Reviewed 2026-10-26 · Record 4fe779824d

Terms in this record

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

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