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The Encyclopedia of Horology

Wristwatch · Self-winding chronometer wristwatch

Omega Constellation Ref. 2852 Wristwatch

Partially verified

This Omega Constellation wristwatch, reference 2852, dates from the late 1950s and is presented in an 18K yellow gold two-body case. The watch features a polished finish, a lapidated bezel, and concave lugs, with a snap-on case back that includes the Constellation logo and the engraving "Constellation, Waterproof." It houses an automatic, copper-colored Caliber 505 movement, which contains 24 jewels, a straight-line lever escapement, and a micrometer regulator. The balance is monometallic and adjusted to five positions and temperatures. The two-tone silver dial is marked with applied faceted yellow gold indexes, Arabic numerals, luminous dots, and a gold star at the 6 o'clock position. The luminous yellow gold dauphine hands indicate the time. The timepiece is accompanied by an 18K yellow gold Omega buckle. The auction description reports that the movement, case, and dial are signed.

Front view of the Omega Constellation ref. 2852 on a brown leather strap.
Front view of the Omega Constellation ref. 2852 on a brown leather strap. — Antiquorum. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
catalog.antiquorum.swiss
Category
Wristwatch · Self-winding chronometer wristwatch
Maker / attribution
Omega
Reference
2852
Catalogue / lot identifier
22
Source-reported date
late 1950's
Source-reported place
Not established
Source-reported serial
15175055

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 timepiece features a two-body, solid 18K yellow gold case measuring 35 mm in diameter. The exterior is distinguished by a polished finish and a lapidated bezel, complemented by concave lugs. The case back is a snap-on type, specifically engraved with the Constellation logo and the text "Constellation, Waterproof."

The dial is a two-tone silver design, featuring applied faceted yellow gold indexes interspersed with luminous dots. Arabic numerals are positioned at the 12, 3, 6, and 9 o'clock marks, with an applied gold star situated at the 6 o'clock position. Timekeeping is performed by luminous yellow gold dauphine hands.

Evidence for this section
  • “C. Two-body, solid, polished, lapidated bezel, concave lugs, snap-on back with Constellation logo and engraved ?Constellation, Waterproof.?”
  • “D. Two-tone silver with applied faceted yellow gold indexes and Arabic numerals, luminous dots, applied gold star at 6. Luminous yellow gold dauphine hands.”

Movement

Power is provided by a copper-colored Caliber 505 automatic movement. This caliber incorporates 24 jewels and utilizes a straight-line lever escapement. The movement is equipped with a shock absorber and a self-compensating flat balance spring.

Precision is regulated via a micrometer regulator, and the monometallic balance is adjusted to perform accurately in five positions and across various temperatures. The movement, alongside the case and dial, is signed by the manufacturer.

Evidence for this section
  • “M. Cal. 505, copper-colored, 24 jewels, straight-line lever escapement, monometallic balance adjusted to 5 positions and temperatures, shock absorber, self-compensating flat balance spring, micrometer regulator.”
  • “Dial, case and movement signed.”

Reported Condition

The auction house provides a grading assessment for the watch components, assigning a general grade of AA.

The dial is also graded at 3-7-01, with the auction description noting that the dial is in good condition, although the hands are oxidized. The watch includes an original 18K yellow gold Omega buckle.

Evidence for this section
  • “Grading System Grade: AA Very good Case: 3 Good Movement: 3* Good Overhaul recommended, at buyer's expense Dial: 3-7-01 Good Oxidized HANDS Original”

Open research questions

  • What specific production year within the late 1950s does the serial number 15175055 correspond to?
  • Were there specific regional variants of the 2852 reference that influenced the dial's two-tone finish?

Source evidence

Recorded claims and source quotations for Omega Constellation Ref. 2852 Wristwatch
FieldSource-reported valueSource quotation
Reference2852“Ref. 2852”
MovementCal. 505“M. Cal. 505”
Case Material18K yellow gold“18K yellow gold wristwatch”
Dimensions35 mm diameter, 11 mm thickness“Diam. 35 mm. Thickness 11 mm.”
Movement Details24 jewels, straight-line lever escapement“24 jewels, straight-line lever escapement”
AdjustmentAdjusted to 5 positions and temperatures“monometallic balance adjusted to 5 positions and temperatures”

Visible details

  • Dauphine-style hands with luminous inserts
  • Applied gold star emblem located above 6 o'clock
  • Concave lug design integrated into the case structure
  • Applied Arabic numerals at 12, 3, 6, and 9

Research qualifications

  • The auction description notes the dial is oxidized
  • The auction report recommends a movement overhaul

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

Consulted source

Omega, 'Constellation, Chronometer, Officially Certified,' No.15175055, case No. 120765, Ref. 2852. Made in the late 1950's. Fine and rare, center seconds, self-winding, water-resistant, 18K yellow gold wristwatch with an 18K yellow gold Omega buckle. To be sold without reserve

Reviewed 2026-10-26 · Record fdad6022b1

Terms in this record

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

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