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The Encyclopedia of Horology

Wristwatch · Diamond jewelry wristwatch

Longines 18K white gold diamond jewelry wristwatch

Partially verified

This ladies' jewelry wristwatch by Longines is crafted in 18K white gold and features a circular bezel bordered with brilliant-cut diamonds, extending onto the bracelet links. The source states a total diamond weight of approximately 4 carats. The dial is silvered or white with applied baton hour markers, baton hands, and the inscription 'SWISS MADE' along the lower edge. According to the auction description, the watch is powered by a manual-winding caliber 320 movement, weighs 29.4 grams, and dates to the second half of the 20th century.

Front view of Longines 18K white gold diamond-set jewelry watch dial, bezel, and initial bracelet links
Front view of Longines 18K white gold diamond-set jewelry watch dial, bezel, and initial bracelet links — Auktionshaus Eppli. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
www.invaluable.com
Category
Wristwatch · Diamond jewelry wristwatch
Maker / attribution
Longines
Reference
Not recorded
Catalogue / lot identifier
214
Source-reported date
2nd half of 20th century
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 Visual Presentation

The timepiece features a light-colored dial with applied baton hour indexes and matching hands. The dial display is signed 'LONGINES' below 12 o'clock and 'SWISS MADE' at 6 o'clock.

A circular diamond-set bezel surrounds the small round dial, and adjacent bracelet links are visibly set with individual brilliant-cut stones.

Evidence for this section
  • “Light-colored dial with applied baton hour indexes and matching hands”
  • “Dial signed 'LONGINES' below 12 o'clock and 'SWISS MADE' at 6 o'clock”
  • “Circular diamond-set bezel surrounding a small round dial”
  • “Adjacent bracelet links set with individual brilliant-cut stones”

Reported Gemological and Metal Specifications

The auction catalog describes the item as a jewelry watch crafted in 18K white gold, weighing 29.4 g with a documented length of L: 16.5/17 cm.

The setting is reported to contain brilliant-cut diamonds totalling ca. 4 ct, described in the listing as having good to very good colour and clarity. Independent gemological testing or laboratory reports are not recorded in this source.

Evidence for this section
  • “18K white gold, 29.4 g, L: 16.5/17 cm”
  • “brilliant-cut diamonds totalling ca. 4 ct, good to very good colour and clarity”

Movement and Documentary Limitations

The catalog specifies a manual winding movement caliber 320, reported by the auction house as checked, good working order. The movement is not visible in the provided photograph, and independent timing or service records are not recorded in this source.

The piece is dated in the description to the 2nd half of 20th century. Individual reference numbers, movement serials, and internal hallmarks are not detailed in the auction listing, leaving exact production dating unverified.

Evidence for this section
  • “manual winding movement caliber 320, checked, good working order”
  • “2nd half of 20th century”

Open research questions

  • What reference number and gold hallmarks are stamped on the inside case back?
  • What serial number is engraved on the caliber 320 movement to determine the precise manufacturing year?
  • What type of clasp secures the bracelet, and does it carry Longines factory marks or sizing adjustments?

Source evidence

Recorded claims and source quotations for Longines 18K white gold diamond jewelry wristwatch
FieldSource-reported valueSource quotation
Case and Bracelet Material18K white gold“18K white gold”
Movement CaliberCaliber 320 manual winding“manual winding movement caliber 320”
Total Weight29.4 g“29.4 g”
Total Diamond Weightca. 4 ct“brilliant-cut diamonds totalling ca. 4 ct”
Length16.5/17 cm“L: 16.5/17 cm”
Reported Diamond QualityGood to very good colour and clarity“good to very good colour and clarity”
Reported Mechanical StateChecked, good working order“checked, good working order”
Catalog Lot ConditionGood condition (Gut)“good condition”

Visible details

  • Circular diamond-set bezel surrounding a small round dial
  • Light-colored dial with applied baton hour indexes and matching hands
  • Adjacent bracelet links set with individual brilliant-cut stones
  • Dial signed 'LONGINES' below 12 o'clock and 'SWISS MADE' at 6 o'clock

Research qualifications

  • Movement caliber and working condition are source-reported and not visible in the photograph
  • Clasp and full bracelet length are not shown in the image

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

Consulted source

Sold at Auction: LONGINES jewelry watch with brilliant-cut diamonds totaling approx. 4 ct,

Reviewed 2026-10-21 · Record f53e6231c9

Terms in this record

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