Skip to content
The Encyclopedia of Horology

Wristwatch · Square button chronograph

Vacheron & Constantin 18K Pink Gold Chronograph

Partially verified

This Vacheron & Constantin wristwatch, dating to the 1950s, features an 18K pink gold case measuring 34 mm in diameter and 11.5 mm in thickness. The watch is configured as a square button chronograph with a register and tachometer. It is powered by a rhodium-plated Caliber 434 movement, which includes a straight-line lever escapement, monometallic balance, and a self-compensating steel Breguet balance spring. The two-tone silver dial displays applied pink gold baton indexes interspersed with Roman numerals, accompanied by subsidiary dials for the seconds and the 30-minute register. The exterior includes a rounded bezel, concave lugs, and a snap-on case back. The watch is presented with an 18K pink gold Vacheron Constantin buckle and was accompanied by a 2010 service invoice from Turler, Zurich. The dial, case, and movement are signed by the maker.

Front view of the 18K pink gold Vacheron & Constantin square button chronograph with a two-tone silver dial.
Front view of the 18K pink gold Vacheron & Constantin square button chronograph with a two-tone silver dial. — Antiquorum. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
catalog.antiquorum.swiss
Category
Wristwatch · Square button chronograph
Maker / attribution
Vacheron & Constantin
Reference
Not recorded
Catalogue / lot identifier
570
Source-reported date
1950s
Source-reported place
Switzerland
Source-reported serial
431309

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 watch is housed in a three-body 18K pink gold case, characterized by a polished and brushed finish. It features a rounded bezel, concave lugs, and a snap-on case back. The construction measures 34 mm in diameter with a thickness of 11.5 mm.

The dial is rendered in a two-tone silver finish. It incorporates applied pink gold baton indexes and Roman numerals at the 6 and 12 o'clock positions. The layout includes subsidiary dials for constant seconds and the 30-minute chronograph register, alongside an outer minute track and a tachometer scale on the periphery. The hands are fashioned from pink gold.

Evidence for this section
  • “Three-body, solid, polished and brushed, concave lugs, rounded bezel, snap-on case back.”
  • “Two-tone silver with applied pink gold baton indexes with Roman numerals, subsidiary dials for the seconds and the 30 minute register, outer minute and 1/5th second track, outermost tachometer scale.”

Movement and Escapement

The timepiece is driven by the manual-wind Caliber 434 movement. The movement is finished with rhodium plating and features fausses cotes decoration.

The regulating and escapement components consist of a straight-line lever escapement paired with a monometallic balance. Timing is managed via an index regulator and a self-compensating steel Breguet balance spring.

Evidence for this section
  • “M. Cal 434, rhodium plated, fausses cotes decoration, straight line lever escapement, monometallic balance, self-compensating steel Breguet balance spring, index regulator.”

Signatures and History

The dial, case, and movement are each marked with the Vacheron & Constantin signature. The watch was produced in the 1950s.

The object is sold with an original 18K pink gold Vacheron Constantin buckle. Documentation provided with the piece includes a service invoice issued by Turler, Zurich, dated September 10, 2010,

Evidence for this section
  • “Dial, case and movement signed.”
  • “Made in the 1950s.”
  • “Accompanied by a service invoice from Turler, Zurich for the amount of Sfr 6,900 and dated 10.09.2010”

Open research questions

  • What specific production year in the 1950s does the serial number 431309 correspond to in Vacheron Constantin production records?
  • Are there recorded instances of this specific dial configuration on other Vacheron & Constantin chronographs of this reference era?

Source evidence

Recorded claims and source quotations for Vacheron & Constantin 18K Pink Gold Chronograph
FieldSource-reported valueSource quotation
Movement Number431309“movement No. 431309”
Case Number276499“case No. 276499”
Movement Caliber434“M. Cal 434”
Case Material18K pink gold“18K pink gold wristwatch”
Case Diameter34 mm“Diam. 34 mm”
Case Thickness11.5 mm“Thickness 11.5 mm”
Dial FeaturesTwo-tone silver“Two-tone silver”
Accessories18K pink gold buckle“18K pink gold Vacheron Constantin buckle”

Visible details

  • Concave lugs on the pink gold case
  • Two-tone dial finish
  • Applied Roman numerals at 6 and 12 o'clock
  • Square-shaped chronograph pushers

Research qualifications

  • Warranty status listed as active in 2010 but expired
  • Full provenance prior to 2010 not disclosed

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

Consulted source

Vacheron & Constantin, Geneve, movement No. 431309, case No. 276499. Made in the 1950s. Very fine and rare, 18K pink gold wristwatch, square button chronograph, register, tachometer with an 18K pink gold Vacheron Constantin buckle. Accompanied by a service invoice from Turler, Zurich for the amount of Sfr 6,900 and dated 10.09.2010 (under warranty for a year) .

Reviewed 2026-10-26 · Record afcbe0276c

Terms in this record

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

Other square button chronograph records