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The Encyclopedia of Horology

Wristwatch · Triple calendar wristwatch with moon phase

Omega Cosmic Ref. 2486-2 Wristwatch

Partially verified

This wristwatch is an Omega Cosmic model, reference 2486-2, dated to approximately 1947. The timepiece features a round, gold-plated case measuring 37mm in diameter with a snap-on case back. The movement is an Omega Caliber 27 DLPC manual wind, 17-jewel movement, identified by the number 11207601. The watch includes a black dial with gilt dart hour markers and gilt dagger-style hands. Complex calendar and astronomical functions are present, with apertures for the day and month located below the 12 o'clock position, a blue calendar hand, and a sub-dial at 6 o'clock containing a moon phase indicator and subsidiary seconds. The case incorporates three quick-set buttons at the 2, 4, and 8 o'clock positions to adjust the calendar features. The watch is presented on an associated black leather strap with a gilt buckle and is signed by the maker on the dial, movement, and case.

Front view of the Omega Cosmic reference 2486-2 wristwatch showing the black dial, calendar windows, moon phase, and black leather strap.
Front view of the Omega Cosmic reference 2486-2 wristwatch showing the black dial, calendar windows, moon phase, and black leather strap. — Bonhams, via Invaluable. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
orbiscollectibles.com
Category
Wristwatch · Triple calendar wristwatch with moon phase
Maker / attribution
Omega
Reference
2486-2
Catalogue / lot identifier
Source URL identifies the listing
Source-reported date
Circa 1947
Source-reported place
Not established
Source-reported serial
11207601

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 watch is housed in a round, gold-plated case with a diameter of 37mm. The construction features a snap-on case back, which the source notes contains a personal inscription. To facilitate adjustments for the calendar complications, the case side is fitted with three individual quick-set buttons located at the 2, 4, and 8 o'clock positions.

The dial is finished in black and displays a high density of information. Gilt dart hour markers are set around the periphery, accompanied by outer scales for the calendar and minutes. Time is indicated by gilt dagger-style hands, while a blue-colored hand serves as the date indicator. Apertures for the day and month are situated directly below the 12 o'clock position, and a sub-dial at 6 o'clock displays the moon phase mechanism and subsidiary seconds.

Evidence for this section
  • “polished round gold-plated case measuring 37mm in diameter, with a snap-on case back bearing a personal inscription”
  • “quick-set buttons at the 2, 4, and 8 o'clock positions”
  • “The black dial is detailed with gilt dart hour markers and outer minute and calendar scales”
  • “subsidiary dial at the 6 o'clock position displays the moon phase along with the subsidiary seconds”

Movement and Mechanics

Power for the watch is provided by an Omega Caliber 27 DLPC manual wind movement. This mechanism is specified as having 17 jewels and is inscribed with the movement number 11207601. The movement is responsible for driving the multiple calendar displays and the astronomical moon phase complication integrated into the dial.

The movement is signed by Omega, consistent with the signature found on the dial and case. The system is designed to allow the user to adjust the day, month, and moon phase via the external buttons mounted on the side of the watch case.

Evidence for this section
  • “powered by an Omega 17-jewel Caliber 27 DLPC manual wind movement, numbered 11207601”
  • “The watch is signed on the dial, case, and movement”
  • “Calendar functions include apertures for the day and month positioned below the 12 o'clock marker, accompanied by a blue calendar hand”

Provenance and Presentation

The object is recorded as being from circa 1947. The source documents that the timepiece is currently fitted with an associated black leather strap and a gilt-colored buckle, rather than components original to the watch at the time of manufacture.

Documentation for this item is derived from an auction listing archive. The record states that the watch has been examined as an individual specimen and that it is signed across its dial, movement, and case. All descriptions provided are specific to this single example, and the record acknowledges that other examples of the reference 2486-2 might vary in detail.

Evidence for this section
  • “dates to approximately 1947”
  • “fitted with an associated black leather strap and a gilt buckle”
  • “The watch is signed on the dial, case, and movement”
  • “Details apply to that one example; other examples of the type may differ”

Open research questions

  • What is the specific text of the personal inscription found on the snap-on case back?
  • Does the current movement number 11207601 fall within the expected production range for Omega caliber 27 DLPC movements manufactured in 1947?

Source evidence

Recorded claims and source quotations for Omega Cosmic Ref. 2486-2 Wristwatch
FieldSource-reported valueSource quotation
Reference2486-2“reference 2486-2”
Movement number11207601“numbered 11207601”
MovementOmega 17-jewel Caliber 27 DLPC“Omega 17-jewel Caliber 27 DLPC manual wind movement”
Case diameter37mm“measuring 37mm in diameter”
Case typeGold-plated, snap-on back“polished round gold-plated case measuring 37mm in diameter, with a snap-on case back”
Dial detailsBlack dial, gilt dart markers“The black dial is detailed with gilt dart hour markers”
ComplicationsTriple calendar, moon phase“Triple calendar, moon phase”
Quick-set buttons2, 4, and 8 o'clock“quick-set buttons at the 2, 4, and 8 o'clock positions”

Visible details

  • Blue calendar pointer hand
  • Moon phase aperture with lunar disc display
  • Three lateral quick-set pushers on case side
  • Gilt dart hour indices against black dial background

Research qualifications

  • The source classifies the date as 'probable' and 'circa'
  • The strap and buckle are described as 'associated' rather than original

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

Consulted source

Omega Cosmic Ref: 2486-2 gold plated triple calendar wristwatch with moon phase

Reviewed 2026-11-02 · Record 8c58b9aaea

Terms in this record

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

Other triple calendar wristwatch with moon phase records