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The Encyclopedia of Horology

Wristwatch · Tourbillon wristwatch

Girard-Perregaux Ref. 99535OR 1966 Tourbillon Gold Bridge

Partially verified

This Girard-Perregaux 1966 Tourbillon Gold Bridge, reference 99535OR, is a limited edition wristwatch cased in 18K pink gold, numbered 4 out of 25 pieces made. Dated circa 2013 by the source, the watch features a 40 mm round case housing the automatic in-house calibre GP 9600-0014 with 31 jewels. Its silvered sunburst dial features applied gold indices at the cardinal quarters, fine printed markers, and a lower aperture at 6 o'clock revealing the 60-second tourbillon cage secured under an arrow-shaped gold bridge. Fitted to a brown crocodile leather strap with an 18K pink gold pin buckle, it was offered accompanied by presentation box and accessories.

Front view of the Girard-Perregaux 1966 Tourbillon Gold Bridge showing the silvered dial and exposed tourbillon at 6 o'clock
Front view of the Girard-Perregaux 1966 Tourbillon Gold Bridge showing the silvered dial and exposed tourbillon at 6 o'clock — Phillips. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
www.phillips.com
Category
Wristwatch · Tourbillon wristwatch
Maker / attribution
Girard-Perregaux
Reference
99535OR
Catalogue / lot identifier
1045
Source-reported date
Circa 2013
Country
Switzerland
Source-reported serial
4/25

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 Construction and Presentation

The watch features a round case rendered in 18K pink gold, catalogued at 40 mm in diameter. It is fitted with a fluted winding crown displaying the GP logo and mounted on a brown crocodile strap secured by an 18K pink gold Girard-Perregaux pin buckle.

Identified under reference 99535OR and case number 4/25, the piece is catalogued as numbered 4 of a limited edition of 25 pieces within the maker's 1966 collection. Visual observation confirms a round pink gold case and brown leather strap, matching the catalogued specification.

Evidence for this section
  • “Round 18K pink gold case fitted with a brown leather strap and fluted crown bearing the GP logo.”
  • “numbered 4 of a limited edition of 25 pieces”
  • “Clasp/Buckle 18K pink gold Girard-Perregaux pin buckle”
  • “Dimensions 40mm diameter”
  • “Material 18K pink gold”

Dial Display and Tourbillon Complication

The dial displays a silvered sunburst brushed finish paired with applied gold hour batons positioned at 12, 3, and 9 o'clock alongside printed indices. It is signed 'GP GIRARD-PERREGAUX' below 12 o'clock and marked 'SWISS MADE' at 6 o'clock.

The lower dial features an open aperture at 6 o'clock housing a tourbillon mechanism, described in the catalogue essay as a 60-second tourbillon. The mechanism is mounted beneath Girard-Perregaux's signature arrow-ended pink gold bridge centered by a large jewel bearing.

Evidence for this section
  • “Silvered dial with a fine sunburst brushing and applied gold hour batons at 12, 3, and 9 o'clock.”
  • “Open dial aperture at 6 o'clock revealing a tourbillon mechanism mounted beneath an arrow-ended pink gold bridge centered by a large jewel.”
  • “Signed 'GP GIRARD-PERREGAUX' below 12 o'clock and 'SWISS MADE' at 6 o'clock.”
  • “The highlight is the 60-second tourbillon at 6 o’clock, showcased beneath the iconic large gold bridge and centered on a prominent ruby”

Reported Movement and Accompanying Material

Internal power is source-reported to derive from the in-house automatic calibre GP 9600-0014 configured with 31 jewels. The cataloguing notes that the case, dial, movement, and buckle are all signed.

Dating is provided approximately as circa 2013 by the cataloguing house. Accompanying items listed comprise an instruction manual, loupe, cloth, travel pouch, fitted presentation box, outer packaging, and a blank Girard-Perregaux guarantee card stamped 'Absolute Time'.

Evidence for this section
  • “Calibre Automatic, cal. GP 9600-0014, 31 jewels”
  • “Signed Case, dial, movement and buckle signed”
  • “Year Circa 2013”
  • “Accompanied by blank Girard-Perregaux guarantee card stamped Absolute Time, instruction manual, loupe, cloth, travel pouch, fitted presentation box and outer packaging.”

Open research questions

  • What specific hallmarks and caseback inscriptions are engraved on case number 4/25?
  • Can the date of retail delivery be established through archival records, given that the warranty card was retained blank apart from the retailer stamp?

Source evidence

Recorded claims and source quotations for Girard-Perregaux Ref. 99535OR 1966 Tourbillon Gold Bridge
FieldSource-reported valueSource quotation
Reference99535OR“Reference No 99535OR”
Case Number4/25“Case No 4/25”
CalibreAutomatic, cal. GP 9600-0014, 31 jewels“Calibre Automatic, cal. GP 9600-0014, 31 jewels”
Material18K pink gold“Material 18K pink gold”
Dimensions40mm diameter“Dimensions 40mm diameter”
Editionnumbered 4 of a limited edition of 25 pieces“numbered 4 of a limited edition of 25 pieces”
Accompanying AccessoriesFitted presentation box, outer packaging, instruction manual, loupe, cloth, travel pouch, and stamped blank guarantee card“Accompanied by blank Girard-Perregaux guarantee card stamped Absolute Time, instruction manual, loupe, cloth, travel pouch, fitted presentation box and outer packaging.”
Retailer StampAbsolute Time“guarantee card stamped Absolute Time”
Strap MaterialCrocodile“Bracelet/Strap Crocodile”
Model Name1966 Tourbillon Gold Bridge“Model Name 1966 Tourbillon Gold Bridge”

Visible details

  • Silvered dial with a fine sunburst brushing and applied gold hour batons at 12, 3, and 9 o'clock.
  • Open dial aperture at 6 o'clock revealing a tourbillon mechanism mounted beneath an arrow-ended pink gold bridge centered by a large jewel.
  • Round 18K pink gold case fitted with a brown leather strap and fluted crown bearing the GP logo.
  • Signed 'GP GIRARD-PERREGAUX' below 12 o'clock and 'SWISS MADE' at 6 o'clock.

Research qualifications

  • Movement calibre details, caseback numbering, and internal condition cannot be directly confirmed from the front-facing photograph alone.
  • The source notes that the included guarantee card is blank, although stamped 'Absolute Time'.

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

Consulted source

Girard-Perregaux The Hong Kong Watch Auction: XXII

Reviewed 2026-10-21 · Record ecc44d1f83

Terms in this record

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

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