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The Encyclopedia of Horology

Wristwatch · Annual calendar wristwatch

Patek Philippe Gondolo Annual Calendar Ref. 5135G

Partially verified

This Patek Philippe Gondolo Annual Calendar, reference 5135G, is an 18K white gold wristwatch manufactured in 2006. The watch features a tonneau-shaped case measuring 38 x 51 mm, characterized by a stepped bezel, concave and curved lugs, and a transparent screwed-down case back. It is powered by the self-winding Caliber 324/205, which incorporates an annual calendar mechanism, moon phases, and a 24-hour display. The dial is finished in anthracite with guilloche texture, applied white gold Arabic numerals, and dart indexes. The movement is rhodium-plated, features fausses cotes decoration, and is stamped with the Seal of Geneva. Additional details include 34 jewels, a 21K gold rotor, and an 18K white gold Patek Philippe buckle. The object is accompanied by its original box and Certificate of Origin, documenting the specific case and movement numbers.

Patek Philippe Ref. 5135G with accompanying box, documentation, and accessories.
Patek Philippe Ref. 5135G with accompanying box, documentation, and accessories. — Antiquorum. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
catalog.antiquorum.swiss
Category
Wristwatch · Annual calendar wristwatch
Maker / attribution
Patek Philippe
Reference
5135G
Catalogue / lot identifier
179-57
Source-reported date
2006
Source-reported place
Switzerland
Source-reported serial
4337853

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 Design

The watch features a tonneau-shaped, two-body case constructed from 18K white gold. The exterior design incorporates a polished finish, a stepped bezel, and concave, curved lugs. The case band contains push-piece correctors for adjusting the annual calendar functions. A transparent sapphire crystal case back allows for visibility of the movement.

The dial is finished in anthracite with guilloche decoration. It features applied white gold Arabic numerals and dart-shaped indexes positioned on a plain reserve. Time is indicated by white gold dauphine hands, while the complications are displayed through dedicated apertures: the days of the week at 10 o'clock, the date at 12 o'clock, and the months at 2 o'clock. A combined moon phase and 24-hour display is situated at the 6 o'clock position.

Evidence for this section
  • “, solid, polished, stepped bezel, concave and curved lugs, correctors on the band, transparent screwed-down case back”
  • “Guilloche anthracite with applied white gold arabic numerals and dart indexes on a plain reserve”

Movement and Technical Specifications

Internally, the watch is driven by the Patek Philippe Caliber 324/205, a self-winding movement stamped with the Seal of Geneva quality mark. The movement is rhodium-plated and finished with fausses cotes decoration. It is equipped with 34 jewels and a 21K gold rotor.

The escapement is a straight-line lever type with a Gyromax balance adjusted for heat, cold, isochronism, and 5 positions. The technical assembly includes a shock absorber and a self-compensating free-sprung flat balance spring. The movement functions provide an annual calendar, moon phases, center seconds, and a 24-hour indication.

Evidence for this section
  • “Cal. 324/205, stamped with the Seal of Geneva quality mark”
  • “rhodium-plated, fausses côtes decoration, 34 jewels, straight-line lever escapement”
  • “Gyromax balance adjusted to heat, cold, isochronism and 5 positions”

Condition and Accompanying Documentation

The auction description assigns high condition grades to the watch components. The movement is classified as 'As new' (Grade 1), while the dial is also described as 'As new' (Grade 1-01). The case is rated as 'Very good' (Grade 2). The watch is accompanied by an original box and the official Certificate of Origin.

The documentation provided verifies the watch as an 18K white gold Gondolo model. All primary components, including the dial, case, and movement, are reported as signed by the manufacturer.

Evidence for this section
  • “Grading System Grade: AAA Excellent Case: 2 Very good Movement: 1 As new Dial: 1-01 As new”
  • “Accompanied by the original box and Certificate of Origin.”
  • “Dial, case and movement signed.”

Open research questions

  • What is the specific frequency of the Caliber 324/205 movement?
  • Are there known production variations within the 5135G reference range?

Source evidence

Recorded claims and source quotations for Patek Philippe Gondolo Annual Calendar Ref. 5135G
FieldSource-reported valueSource quotation
MakerPatek Philippe“Patek Philippe, Genève”
Reference5135G“Ref. 5135 G”
Movement Number3423816“movement No. 3423816”
Case Number4337853“case No. 4337853”
Production Year2006“Made in 2006”
Case Dimensions38 x 51 mm“Dim. 38 x 51 mm”
Thickness12 mm“Thickness 12 mm”
Movement CaliberCal. 324/205“Cal. 324/205”

Visible details

  • Anthracite guilloche dial with applied indices
  • Tonneau case shape with integrated crown protection
  • Transparent exhibition case back displaying movement
  • Correctors visible on the case band for calendar settings

Research qualifications

  • The source attributes the watch to a 2006 manufacture date.
  • Specific condition ratings (AAA, 1, 2) are based on the auction description's internal grading system.

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

Consulted source

White Gold Ref. 5135 Patek Philippe, Genève, "Gondolo - Annual Calendar", movement No. 3423816, case No. 4337853, Ref. 5135 G. Made in 2006. Very fine and rare, tonneau-shaped, Art Deco-style, astronomic, center seconds, self-winding, 18K white gold wristwatch with annual calendar, moon phases, 24-hour indication and an 18K white gold Patek Philippe buckle. Accompanied by the original box and Certificate of Origin.

Reviewed 2026-10-26 · Record 7c563fed7b

Terms in this record

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

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