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The Encyclopedia of Horology

Pocket watch · Triple calendar moon-phase pocket watch

18K Gold Moon-Phase Calendar Pocket Watch

Partially verified

This antique pocket watch is reported by the dealer as Swiss-made, dating to circa 1890, and cased in 18K pink gold measuring 50 mm wide by 17 mm deep. The white enamel dial features black Roman hour numerals, an outer minute track with five-minute markers, and pierced gilt filigree hands. A central horizontal aperture presents triple calendar indications showing day, date, and month in French. Positioned at 6 o'clock, the subsidiary seconds dial encloses a blue steel and gold moon-phase display. According to the source, the piece houses a 15-jewel stem-wound, pin-set gilt bridge movement with a lever escapement.

Front view of the 18K gold pocket watch showing the enamel dial, calendar apertures, and moon-phase indicator
Front view of the 18K gold pocket watch showing the enamel dial, calendar apertures, and moon-phase indicator — Atlam Watches. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
www.antiquesboutique.com
Category
Pocket watch · Triple calendar moon-phase pocket watch
Maker / attribution
Not established
Reference
Not recorded
Catalogue / lot identifier
5.14 (AB-58135)
Source-reported date
c. 1890
Country
Switzerland

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 and Display Indications

The timepiece features a white enamel dial with black Roman numerals, an outer five-minute scale, and ornate gilt filigree hour and minute hands. Positioned horizontally across the center of the dial is an elongated aperture revealing triple calendar discs with visible text in French.

According to the dealer, the day and date functions advance automatically every 24 hours or can be set manually by corresponding case-side pins, whereas the month function is adjusted only manually by its pin. Situated below the subsidiary seconds dial is an aperture displaying a gold-tone moon on a blue steel disc, which the dealer notes is also set manually via a dedicated pin.

Evidence for this section
  • “White enamel dial featuring black Roman numeral hour markers and an outer five-minute scale.”
  • “In the centre of the dial is a long aperture which partially reveals three dials. Two are for the day and date and these change automatically every 24 hours or can be set manually by their corresponding pin on the side of the case.”
  • “The third dial is for the month function and this is only set manually by its pin.”
  • “Below the sub seconds dial is beautiful gold colour on blue steel moon-phase dial. This is set manually by its pin.”

Case Construction

The watch is housed in an open-face pink 18K gold case measuring 50 mm wide by 17 mm deep, fitted with a mineral glass crystal. Visual observation confirms a smooth polished case exterior, a winding crown at the top, and an oval bow.

The seller reports that the case construction features a hinged inner cuvette, back cover, and bezel. In addition, the source notes that the back cover incorporates shoulders shaped to fit closely around the winding stem.

Evidence for this section
  • “movement comes in a pink 18K gold case, which has a hinged inner, back and bezel.”
  • “The case has shoulders on the back cover which fit snugly around the stem and is always a sign of a quality case.”
  • “The case has a smooth plain finish and is in 95% mint condition”
  • “The watch has a mineral glass”
  • “The watch measures 50mm wide x 17mm deep”

Movement and Operational Characteristics

Internal movement components are not visible in the front photograph. The dealer reports a Swiss stem-wound and pin-set gilt bridge movement configured with a lever escapement and 15 jewels.

Additional movement attributes reported by the source include a steel cap over the lever bridge and wolf-teeth winding wheels featuring a brushed steel finish and secured by three screws apiece. No maker or signature is recorded in the source text or visible on the dial.

Evidence for this section
  • “This is a Swiss pocket watch.”
  • “Movement – the top quality gilt bridge movement has a lever escapement with 15 jewels, a steel cap on the lever bridge and wolf teeth winding wheels with a brushed steel finish and three screws apiece.”
  • “The watch is stem wound / pin set”

Open research questions

  • What maker's hallmarks, Swiss assay punches, or case maker stamps are struck on the inside of the hinged back cover and cuvette?
  • Does the gilt bridge movement bear an ébauche mark, serial number, or Swiss patent (Brevet) stamp beneath the balance or bridges?
  • Are there manufacturer markings on the French calendar discs or dial plate to identify the caliber supplier?

Source evidence

Recorded claims and source quotations for 18K Gold Moon-Phase Calendar Pocket Watch
FieldSource-reported valueSource quotation
Escapement and Jewels15 jewels with lever escapement“top quality gilt bridge movement has a lever escapement with 15 jewels”
Case Material18K pink gold“movement comes in a pink 18K gold case”
Calendar DisplayTriple calendar aperture revealing day, date, and month“In the centre of the dial is a long aperture which partially reveals three dials. Two are for the day and date”
Dimensions50 mm wide x 17 mm deep“The watch measures 50mm wide x 17mm deep”
Winding and SettingStem wound, pin set“The watch is stem wound / pin set”
CrystalMineral glass“The watch has a mineral glass”
Winding Wheel ConstructionWolf-teeth winding wheels with brushed steel finish secured by three screws each“wolf teeth winding wheels with a brushed steel finish and three screws apiece”
Lever Bridge DetailingSteel cap on lever bridge“a steel cap on the lever bridge”
Accompanying BoxVintage leather fitted box lined with velvet and silk“The watch comes in a vintage good quality leather fitted box lined with velvet and silk.”

Visible details

  • White enamel dial featuring black Roman numeral hour markers and an outer five-minute scale.
  • Central horizontal window displaying calendar disks printed in French ('SAM 16 JAN').
  • Gilt filigree hour and minute hands with ornate openwork detailing.
  • Subsidiary seconds chapter ring at the 6 o'clock position integrating a moon-phase aperture with a gold face on a blue steel background.
  • Polished gold open-face case with top winding crown and oval bow.

Research qualifications

  • The maker is not stated in the source text or shown on the dial.
  • Movement details, inner cuvette, and case interior are source-reported and not visible in the front photograph.

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

Consulted source

18K gold moon-phase calendar pocket watch c1890 in Antique Pocket Watches

Reviewed 2026-10-21 · Record aed57d3858

Terms in this record

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