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The Encyclopedia of Horology

Pocket watch · Open-face pocket watch

Patek Philippe 18K Yellow Gold Open Face Pocket Watch

Partially verified

This open face pocket watch features a 44.00 mm 18K yellow gold case and a champagne single-sunk dial signed 'PATEK PHILIPPE & Co GENEVA-SWITZERLAND'. The dial displays stylized Arabic numerals, an outer railway minute track, blued steel Breguet hands, and a subsidiary seconds subdial at 6 o'clock. The auction catalog states that the watch houses an 18-jewel stem-wound and set nickel movement with eight adjustments, bearing movement number 180461. The source also reports an inner case back stamp reading 'PATEK PHILIPPE & Co SWITZERLAND 18K' with Swiss hallmarks and case number 401250, alongside a case back decorated with a black enamel monogram.

Patek Philippe 18K yellow gold open face pocket watch, front view
Patek Philippe 18K yellow gold open face pocket watch, front view — Freeman's. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
freemansauction.com
Category
Pocket watch · Open-face pocket watch
Maker / attribution
Patek Philippe & Co.
Reference
Not recorded
Catalogue / lot identifier
139
Source-reported date
Not established
Source-reported place
Switzerland
Source-reported serial
180461

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 Exterior Construction

This is an open-face pocket watch featuring an 18K yellow gold case measuring 44.00 mm in diameter. The case is equipped with a top-mounted fluted winding crown and an oval suspension bow. The source describes the case back as being accented with a black enamel monogram.

Visible condition reports note superficial scratches on the gold case consistent with age and use. The specific case back decoration is not visible in the available catalog imagery.

Evidence for this section
  • “44.00 mm case diameter”
  • “case back accented with black enamel monogram”
  • “There are superficial scratches to gold case consistent with age and use.”

Dial and Timekeeping Components

The watch features a champagne-toned, single-sunk dial signed 'PATEK, PHILIPPE & Co'. The dial is styled with Arabic numerals and an outer railway minute track, with a subsidiary seconds register positioned at 6 o'clock.

Time is indicated by blued steel Breguet-style hands. According to the provided condition report, the minute hand shows wear and an absence of the original blued steel coloring toward the tip. The source notes the presence of scattered smudges on the dial that are not easily visible to the naked eye.

Evidence for this section
  • “champagne single-sunk dial signed PATEK, PHILIPPE & Co”
  • “blued steel Breguet hands”
  • “The end of the minute hand shows wear and absence to the blued steel coloring.”
  • “There are scattered smudges to the dial that are not easily eye visible.”

Movement and Internal Markings

The timepiece is powered by an 18-jewel stem-wound and set nickel movement featuring eight adjustments, signed 'PATEK, PHILIPPE & Co'. The movement is identified by the serial number 180461.

The interior of the case back is reported by the source to be stamped 'PATEK PHILIPPE & Co SWITZERLAND 18K', accompanied by Swiss hallmarks and the case number 401250. These internal markings are not visible in the provided photographic media.

Evidence for this section
  • “18 jewel stem wound and set nickel movement with eight adjustments signed PATEK, PHILIPPE & Co.”
  • “Movement number: 180461.”
  • “Inner case back stamp: PATEK PHILIPPE & Co SWITZERLAND 18K (Swiss hallmarks) 401250.”

Open research questions

  • What do the specific Swiss hallmarks referenced in the internal case back indicate regarding the manufacture date?
  • Does the case number 401250 match the production sequence associated with movement 180461 in Patek Philippe records?

Source evidence

Recorded claims and source quotations for Patek Philippe 18K Yellow Gold Open Face Pocket Watch
FieldSource-reported valueSource quotation
Case Diameter44.00 mm“44.00 mm case diameter”
Case Material18K Yellow Gold“18K Yellow Gold Open Face Pocket Watch”
Movement Number180461“Movement number: 180461.”
Inner Case Back Stamp401250“Inner case back stamp: PATEK PHILIPPE & Co SWITZERLAND 18K (Swiss hallmarks) 401250.”
Movement Jewels and Adjustments18 jewels, eight adjustments“18 jewel stem wound and set nickel movement with eight adjustments signed PATEK, PHILIPPE & Co.”
Total Weight34.20 dwts“34.20 dwts.”
Working StatusWinds, sets, and runs“The pocket watch winds, sets and runs but has not been timed for accuracy.”

Visible details

  • Champagne-toned dial with printed black Breguet-style Arabic numerals and railway minute track.
  • Blued steel Breguet-style hour and minute hands, with wear and loss of bluing visible toward the tip of the minute hand.
  • Subsidiary seconds register at 6 o'clock with Arabic numerals at ten-second intervals.
  • Top-mounted fluted winding crown fitted with an oval suspension bow.
  • Dial signed below 12 o'clock: 'PATEK PHILIPPE & Co GENEVA-SWITZERLAND'.

Research qualifications

  • Movement and inner case back stamps are not visible in the supplied catalog photograph.
  • The case back and its reported black enamel monogram are not depicted.

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

Consulted source

Patek Philippe, 18K Yellow Gold Open Face Pocket Watch | Freeman's

Reviewed 2026-10-22 · Record 7bad5e2f08

Terms in this record

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

Other open-face pocket watch records