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The Encyclopedia of Horology

Wristwatch · Perpetual calendar wristwatch

Patek Philippe 18ct Rose Gold Perpetual Calendar Wristwatch Reference 3940R

Partially verified

This Patek Philippe wristwatch, reference 3940R, is constructed in an 18ct rose gold case measuring 35mm in diameter. The timepiece features a silvered dial with applied pink gold faceted baton and pyramidal indexes, accompanied by rose gold dauphine hands and an outer dot minute track. The watch is powered by a 27-jewel Caliber 240Q automatic movement. This rhodium-plated movement incorporates fausses cotes decoration, a straight-line lever escapement, a Gyromax balance with a self-compensating free-sprung flat balance spring, and a 22ct gold micro-rotor. The movement is stamped with the Seal of Geneva. Complications include a perpetual calendar with subsidiary dials for the day, month, leap year, and 24-hour cycle, alongside a moon phase aperture. The watch is presented with a black leather strap, an 18ct rose gold deployant clasp, a setting tool, and an original wooden fitted box.

Front view of the Patek Philippe 3940R showing the dial layout, hands, and rose gold case.
Front view of the Patek Philippe 3940R showing the dial layout, hands, and rose gold case. — Roseberys, via Invaluable. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
orbiscollectibles.com
Category
Wristwatch · Perpetual calendar wristwatch
Maker / attribution
Patek Philippe
Reference
3940R
Catalogue / lot identifier
Source URL identifies the listing
Source-reported date
1997
Source-reported place
Not established
Source-reported serial
2981617

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 features a polished 35mm case manufactured in 18ct rose gold. The design includes a transparent exhibition back, which allows for visual access to the internal mechanical components.

The silvered dial is adorned with applied pink gold faceted baton and pyramidal indexes. Time is indicated by rose gold dauphine hands, with an outer dot minute track framing the display.

Evidence for this section
  • “presented in a polished 35mm gold case with a transparent exhibition back”
  • “silvered dial adorned with applied pink gold faceted baton and pyramidal indexes, complemented by matching rose gold dauphine hands and an outer dot minute track”

Movement and Complications

The timepiece is powered by the Patek Philippe Caliber 240Q automatic movement, a 27-jewel mechanism. The movement is rhodium-plated and features fausses cotes decoration and a 22ct gold micro-rotor. It is fitted with a straight-line lever escapement and a Gyromax balance featuring a self-compensating free-sprung flat balance spring. The movement carries the Seal of Geneva.

The perpetual calendar complication manages the date and time functions via subsidiary dials for the day, month, leap year, and 24-hour cycle, complemented by a moon phase aperture positioned on the dial.

Evidence for this section
  • “powered by a 27-jewel Caliber 240Q movement, which is rhodium-plated and features fausses cotes decoration”
  • “The perpetual calendar functionality includes subsidiary dials for the day, month, leap year, and 24-hour cycle, alongside a moon phase aperture.”

Presentation and Accessories

The watch is accompanied by an original wooden fitted box. In addition to the timepiece and box, the set includes a Patek Philippe black leather strap and an 18ct rose gold deployant clasp.

The listing also includes a setting tool, intended for adjusting the perpetual calendar indications.

Evidence for this section
  • “includes a Patek Philippe black leather strap, an 18ct rose gold deployant clasp, a setting tool, and its original wooden fitted box.”

Open research questions

  • Does the movement serial number correlate with the production year 1997?
  • Are there any signs of wear on the leather strap noted by the source beyond the initial cataloging?

Source evidence

Recorded claims and source quotations for Patek Philippe 18ct Rose Gold Perpetual Calendar Wristwatch Reference 3940R
FieldSource-reported valueSource quotation
MakerPatek Philippe“Patek Philippe”
Reference3940R“reference 3940R”
Case Material18ct rose gold“18ct rose gold”
MovementCaliber 240Q“Caliber 240Q”
Jewels27“27-jewel”
Case Number2981617“2981617”
Movement Number776493“776493”

Visible details

  • Applied gold indexes on a silvered dial
  • Sub-dials for perpetual calendar indications
  • Moon phase aperture at six o'clock position
  • Exhibition case back allowing view of the movement

Research qualifications

  • The exact extent of the movement's servicing history remains unstated in the source
  • The source lists the object as a 'probable' classification for the record status

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

Consulted source

Patek Philippe 18ct rose gold perpetual calendar wristwatch ref. 3940R

Reviewed 2026-11-02 · Record d951745f7c

Terms in this record

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

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