Omega Constellation Constellation Co-Axial 31 Yellow Gold / MOP

Reference 123.50.31.20.55.002

Omega Constellation Co-Axial 31 Yellow Gold / MOP

About this watch

The Omega Constellation Co-Axial 31 Yellow Gold / MOP (Model: 123.50.31.20.55.002) is a luxurious timepiece that exudes opulence and sophistication. With its stunning Mother of Pearl dial, gem-set indexes, and 18K yellow gold case, this watch is a true masterpiece of craftsmanship. The Omega caliber 8521 movement features a Co-Axial escapement, designed to enhance precision, stability, and durability. This self-winding movement boasts a 50-hour power reserve and is protected by a scratch-resistant sapphire crystal. With its water resistance of up to 100 meters, this watch can keep pace with your active lifestyle. The Constellation's design ensures it sits comfortably on the wrist, making it perfect for both casual and formal settings. Whether you're a seasoned watch collector or looking for a special piece to mark an occasion, this timepiece is sure to impress. Its unique blend of art, technology, and luxury makes it a true standout in the world of watches.
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Key Features

  • Omega caliber 8521 movement
  • 18K yellow gold case
  • Mother of Pearl dial
  • Gem-set indexes
  • Scratch-resistant sapphire crystal
  • Water resistance up to 100 meters

Specifications

Brand
Omega
Family
Constellation
Model
Constellation Co-Axial 31 Yellow Gold / MOP
Reference
123.50.31.20.55.002
Movement
8521
Movement Features
  • Hours, Minutes, Seconds
  • Date
  • Chronometer, Co-Axial Escapement
Case
Yellow Gold 31mm
Dial Color
White
Crystal
Sapphire
Water Resistance
100

Current Listings

[WTS] Excellent Omega Constellation Chronometer 198.0126 Call1333 Mens Watch $500

Excellent Omega Constellation Chronometer 198.0126 Call1333 Mens Watch $500

Omega - 198.0126 · $500
A men's Omega Constellation Chronometer reference 198.0126 made in Switzerland with a quartz cal 1333 movement.

  • Condition: Preowned, with little wear and marks
  • Movement: Quartz Cal 1333
  • Country Of Manufacture: Switzerland
  • Case Material: Stainless steel
Posted at
Dec 27, 2025, 12:40 PM
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[WTS] Omega Constellation 196.0071 – Replacement Bracelet – $150 (fixed) Free worldwide shipping

Omega Constellation 196.0071 – Replacement Bracelet – $150 (fixed) Free worldwide shipping

Omega - Constellation 196.0071 · $150
Posted at
Dec 27, 2025, 8:53 AM
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[WTS] Demi Gold Omega Constellation Pie Pan Ref. 168.005 with Applied Indices | Great Condition (Serviced) | $2600

Demi Gold Omega Constellation Pie Pan Ref. 168.005 with Applied Indices | Great Condition (Serviced) | $2600

Omega - 168.005 · $2,600
The Omega Constellation Pie Pan Ref. 168.005 is a quintessential 1960s dress watch that embodies Omega’s pursuit of precision and elegance during the golden age of Swiss watchmaking, featuring a distinctive pie-pan dial and chronometer-certified accuracy.

  • Condition: Great, serviced
  • Movement: Omega Caliber 564, automatic, 24 jewels, chronometer certified
  • Case size: 34.5mm diameter
  • Lugs: Sculpted dog-leg lugs
Posted at
Dec 25, 2025, 11:14 PM
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[WTS] Omega Constellation. Globemaster. 39mm. 🔥 Dial.

Omega Constellation. Globemaster. 39mm. 🔥 Dial.

Omega - 130.30.39.21.03.001 · $4,400
A Omega Constellation Globemaster, a 39mm watch with additional details provided in the listing.

  • Case Size: 39mm
  • Box And Papers: yes
Posted at
Dec 24, 2025, 11:19 AM
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[WTS] OMEGA Constellation - 368.1201 - 2006 - Amazing condition - Lowest price online with price match ⭐️

OMEGA Constellation - 368.1201 - 2006 - Amazing condition - Lowest price online with price match ⭐️

OMEGA - 368.1201 · $1,595
The Omega Constellation 368.1201 is an automatic stainless steel watch with a white linen dial, featuring a 35.5mm diameter and 10mm thickness. It has a 3ATM water resistance rating and comes with a nice integrated bracelet.

  • Condition: Excellent
  • Diameter: 35.5mm
  • Thickness: 10mm
  • Water Resistance: 3ATM
Posted at
Dec 23, 2025, 10:28 AM
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[WTS] OMEGA Constellation Ref. 123.20.35.20.06.001 Yellow Gold Two-Tone - COMPLETE SET!

OMEGA Constellation Ref. 123.20.35.20.06.001 Yellow Gold Two-Tone - COMPLETE SET!

OMEGA - 123.20.35.20.06.001 · $3,250
A sophisticated timepiece featuring a distinctive stainless steel and yellow gold case with Roman numeral-engraved bezel, grey dial with date window at 3 o'clock, powered by OMEGA's Co-Axial Calibre 2500 movement.

  • Condition: VERY GOOD (some light scratches on bracelet)
  • Case materials: stainless steel and yellow gold
  • Bracelet size adjustment: ~7" wrist
  • Contents included: box, papers, serial hang tag, spare links
Posted at
Dec 22, 2025, 9:02 AM
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[WTS] Omega Constellation C Shape - 168.017 Circa 1969 only for 775$ Shipped 🚢

Omega Constellation C Shape - 168.017 Circa 1969 only for 775$ Shipped 🚢

Omega - 168.017 · $775
A stainless steel Omega Constellation C Shape from 1969 featuring a 35mm case, an off white dial, and automatic movement calibre 564. The watch has no major dents or scratches and keeps accurate time.

  • Condition: Great, with a few hairline scratches
  • Case Size: 35mm diameter
  • Dial Color: off white
Posted at
Dec 22, 2025, 7:54 AM
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[WTS] Omega Constellation 2-Tone Automatic 🇨🇭

Omega Constellation 2-Tone Automatic 🇨🇭

Omega - Constellation Automatic · $1,000
This Omega Constellation Automatic features a 2-tone stainless steel and gold case, matching gold dial, and an original stainless steel bracelet. It's available in great condition.

  • Condition: Great, minor signs of wear
  • Case size without crown: 35mm
  • Lug to lug: 38mm
  • Lug width: 23mm
Posted at
Dec 21, 2025, 7:48 PM
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[WTS] 1971 Omega Constellation Chronometer C-Case ref. 168.0056 w/ Cal. 1011 – serviced Dec 2025 – full original bracelet – $1150 ALL IN shipped

1971 Omega Constellation Chronometer C-Case ref. 168.0056 w/ Cal. 1011 – serviced Dec 2025 – full original bracelet – $1150 ALL IN shipped

Omega - 168.0056 · $1,150
A vintage 1971 Omega Constellation Chronometer in the classic C-Case with a clean dial and full original bracelet.

  • Condition: Excellent condition, with a few scratches on the crystal
  • Calibre: Cal. 1011 (automatic)
  • Case Size: 35mm (excluding crown)
  • Lug Width: 19mm
Posted at
Dec 21, 2025, 9:26 AM
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