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The Encyclopedia of Horology

Wristwatch · Triple calendar moonphase wristwatch

Omega Ref. 2486-1 "Cosmic" Triple Calendar Wristwatch

Partially verified

This Omega reference 2486-1, catalogued under the model name "Cosmic", is a stainless steel manual-wind triple calendar wristwatch dating to 1955. Measuring 37 mm in diameter, the circular case features faceted downturned lugs and inset pushers in the case band. The dial displays Eastern Arabic hour numerals, dual apertures beneath 12 o'clock indicating the day and month in Persian script, a peripheral blue date track with a blued pointer hand, and a combined running seconds subdial and moonphase indicator at 6 o'clock. The source reports that the piece is powered by the 17-jewel manual-wind calibre 381, with Omega archive records citing manufacture on November 24, 1955, and original delivery to Iran.

Omega Ref. 2486-1 "Cosmic" stainless steel triple calendar wristwatch with Persian indications
Omega Ref. 2486-1 "Cosmic" stainless steel triple calendar wristwatch with Persian indications — Phillips. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
www.phillips.com
Category
Wristwatch · Triple calendar moonphase wristwatch
Maker / attribution
Omega
Reference
2486-1
Catalogue / lot identifier
159
Source-reported date
1955
Country
Switzerland
Source-reported serial
13'386'263

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

Construction and Case Features

The Omega reference 2486-1 features a stainless steel circular case measuring 37 mm in diameter. The case includes faceted, downturned lugs and recessed calendar corrector pushers in the case band.

The winding crown bears the Omega logo. The watch is fitted with a leather strap and a signed stainless steel pin buckle.

Evidence for this section
  • “Material Stainless steel”
  • “Dimensions 37mm Diameter”
  • “Signed Case, dial, movement and buckle signed”
  • “superb condition of the large 37mm steel case with faceted downturned lugs”

Dial Configuration

The dial features silvered Eastern Arabic numerals. Beneath the 12 o'clock position, two stepped rectangular apertures display the day and month in Persian script.

A blue peripheral track indicates the date via a pointer hand. At 6 o'clock, a combined moonphase and running seconds subdial is present.

Evidence for this section
  • “feature Hindu numerals and even rarer day and month indication in Persian”
  • “The numerals are silvered”
  • “ultramarine blue outer scale color that indicates the day is perfectly matching the calendar hand”

Mechanism and Provenance

The watch is powered by a 17-jewel manual-wind calibre 381 movement. According to Omega archival records, the watch was produced on November 24, 1955.

The records confirm original delivery to Iran. The movement and interior case back were not visible for inspection in the provided source.

Evidence for this section
  • “Manual, cal. 381, 17 jewels”
  • “Accompanied by Omega Extract from the Archives confirming production of the present watch on November 24, 1955 and delivery to Iran.”

Open research questions

  • What is the significance of 'Case No 17' in the context of Omega reference 2486-1 production?
  • Are there additional archival details regarding the number of 2486-1 units delivered to the Iranian market?

Source evidence

Recorded claims and source quotations for Omega Ref. 2486-1 "Cosmic" Triple Calendar Wristwatch
FieldSource-reported valueSource quotation
Reference2486-1“Reference No 2486-1”
Movement Number13'386'263“Movement No 13'386'263”
Case Number17“Case No 17”
CalibreCal. 381, 17 jewels“Manual, cal. 381, 17 jewels”
Dimensions37mm Diameter“Dimensions 37mm Diameter”
MaterialStainless steel“Material Stainless steel”
Delivery DestinationIran“delivery to Iran”
Case Number17“Case No 17”
Movement Number13'386'263“Movement No 13'386'263”

Visible details

  • Cream-toned dial featuring silvered outline Eastern Arabic numerals and printed minute divisions.
  • Twin stepped rectangular apertures below 12 o'clock displaying day and month text in Persian script.
  • Outer date scale printed in blue Eastern Arabic numerals tracked by a blued pointer hand.
  • Moonphase aperture situated at 6 o'clock with a gold-tone star and moon disc against a dark sky, paired with a central running seconds hand.
  • Stainless steel case with faceted downturned lugs, winding crown signed with the Omega logo, and calendar corrector pushers recessed in the case band.

Research qualifications

  • Movement and interior case back are not visible in the provided image; calibre and movement number rely on source documentation.
  • Archive delivery destination is Iran, but manufacturing origin is Switzerland.

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

Consulted source

Omega The Geneva Watch Auction: SEVEN

Reviewed 2026-10-25 · Record dac17a8440

Terms in this record

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

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