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The Encyclopedia of Horology

Pocket watch · Open-face pocket watch

Patek, Philippe & Cie. 18K gold keyless wind open face pocket watch

Partially verified

This open face pocket watch by Patek, Philippe & Cie. is dated circa 1930 and features an 18K gold case measuring 43mm across. The silvered dial displays black baton hour markers with applied gilt Arabic numerals at the quarters, an outer minute track, gilt leaf hands, and a subsidiary seconds dial at the 6 o'clock position. The auction catalog notes that the watch is powered by a Swiss lever movement numbered 810824, equipped with a cut and compensated bimetallic balance and wolf's tooth winding, housed in a snap-on case back bearing a monogram and personal engraving.

Front view of Patek, Philippe & Cie. open face pocket watch dial and case
Front view of Patek, Philippe & Cie. open face pocket watch dial and case — Bonhams. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
www.bonhams.com
Category
Pocket watch · Open-face pocket watch
Maker / attribution
Patek, Philippe & Cie.
Reference
Not recorded
Catalogue / lot identifier
223
Source-reported date
Circa 1930
Source-reported place
Switzerland
Source-reported serial
810824

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

Dial Configuration and Appearance

The open-face pocket watch features a silvered dial detailed with concentric chapter rings, a black outer minute track, and black baton hour markers. Applied gilt Arabic numerals appear at the 12, 3, and 9 quarter positions, paired with gilt leaf hands and a subsidiary seconds dial calibrated in black at the 6 o'clock position.

The dial is signed 'PATEK, PHILIPPE & CIE' and 'GENÈVE' below 12 o'clock, with 'FAB. SUISSE' printed along the lower boundary. Direct visual observation records peripheral wear and minor aging along the outer edge of the dial surface.

Evidence for this section
  • “Dial: Silvered, black baton hour markers with applied gilt Arabic numeral quarters, black outer minute track, subsidiary seconds at 6, gilt leaf hands”
  • “Dial signed 'PATEK, PHILIPPE & CIE' and 'GENÈVE' beneath 12 o'clock, with 'FAB. SUISSE' along the lower edge.”
  • “Peripheral wear and minor aging visible along the outer edge of the dial.”

Case Architecture and Catalogued Details

Visual observation shows a rounded polished case with an angular bow positioned directly over the winding crown. Hallmarks or stamped marks are visible on the top of the angular bow.

According to auction catalog documentation, the watch is an 18K gold open-face case measuring 43mm across, fitted with a snap-on case back bearing a monogram and personal engraving and catalogued under number 610409. Neither the interior of the case nor the exterior back engraving is visible in the provided image.

Evidence for this section
  • “Open face pocket watch with a rounded polished case and an angular bow atop the winding crown.”
  • “Hallmarks or stamps visible on the top of the angular bow.”
  • “An 18K gold keyless wind open face pocket watch”
  • “Size: 43mm”
  • “Case: Polished round, snap on back with monogram and personal engraving, No.610409”

Movement Specifications and Dating

The movement is not visible in the provided photograph and all internal specifications derive from the catalog listing. The auction house reports a keyless Swiss lever movement numbered 810824, configured with a cut and compensated bi-metallic balance and wolf's tooth winding.

The catalog dates the pocket watch to circa 1930 and records that the case, dial, and movement are each signed. Because the movement and case interior are unpictured, these mechanical and attribution details represent source-reported catalog entries.

Evidence for this section
  • “Date: Circa 1930”
  • “Movement: Swiss lever, cut and compensated bi-metallic balance, wolf's tooth winding, No.810824”
  • “Signed: Case, dial & movement”

Open research questions

  • What specific text, monogram initials, or dates are engraved on the snap-on case back exterior?
  • Which specific assay hallmarks are stamped on the angular bow and within case back 610409?
  • What is the base caliber or bridge layout of Swiss lever movement 810824 when viewed directly?

Source evidence

Recorded claims and source quotations for Patek, Philippe & Cie. 18K gold keyless wind open face pocket watch
FieldSource-reported valueSource quotation
Movement Number810824“No.810824”
Case Number610409“No.610409”
Case Material18K gold“An 18K gold keyless wind open face pocket watch”
Case Diameter43mm“Size: 43mm”
Movement FeaturesSwiss lever, cut and compensated bi-metallic balance, wolf's tooth winding“Movement: Swiss lever, cut and compensated bi-metallic balance, wolf's tooth winding, No.810824”
Case Back DetailsSnap-on back with monogram and personal engraving“snap on back with monogram and personal engraving”

Visible details

  • Open face pocket watch with a rounded polished case and an angular bow atop the winding crown.
  • Hallmarks or stamps visible on the top of the angular bow.
  • Silvered dial with concentric chapter rings, black baton hour indices, and applied gilt Arabic numerals at 12, 3, and 9.
  • Subsidiary seconds register positioned at 6 o'clock with black calibrations.
  • Dial signed 'PATEK, PHILIPPE & CIE' and 'GENÈVE' beneath 12 o'clock, with 'FAB. SUISSE' along the lower edge.
  • Peripheral wear and minor aging visible along the outer edge of the dial.

Research qualifications

  • Movement and case back interior/exterior are not visible in the supplied photograph; movement caliber, serial number, and case engravings are source-reported.
  • The 18K gold purity and internal case number 610409 rely entirely on auction catalog documentation.

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

Consulted source

Bonhams : Patek, Philippe & Cie. An 18K gold keyless wind open face pocket watch Circa 1930

Reviewed 2026-10-21 · Record 62bb3651d9

Terms in this record

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

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