Omega Constellation Constellation Co-Axial 31 Red Gold / MOP

Reference 123.50.31.20.05.001

Omega Constellation Co-Axial 31 Red Gold / MOP

About this watch

The Omega Constellation Co-Axial 31 Red Gold / MOP (Model: 123.50.31.20.05.001) is a statement piece that balances elegance and functionality. Crafted from 18 Ct red gold, it features an exquisite Mother of Pearl dial with a unique, iridescent quality. The watch boasts a self-winding Omega Caliber 8521 movement with Co-Axial escapement, ensuring precision, stability, and durability. With a water resistance of up to 100 meters and a sapphire crystal glass, this timepiece is designed to keep up with your lifestyle. Its versatility makes it suitable for any occasion, whether formal or casual. The Omega Constellation Co-Axial 31 Red Gold / MOP is more than just a watch; it's a piece of art, a conversation starter, and a reliable companion.
Buy Now on Jomashop
This is an affiliate link

Key Features

  • 18 Ct red gold case
  • Mother of Pearl dial with iridescent quality
  • Self-winding Omega Caliber 8521 movement
  • Co-Axial escapement for precision and durability
  • Water resistance up to 100 meters
  • Sapphire crystal glass for scratch-resistant properties
  • Versatile design suitable for formal or casual occasions

Specifications

Brand
Omega
Family
Constellation
Model
Constellation Co-Axial 31 Red Gold / MOP
Reference
123.50.31.20.05.001
Movement
8521
Movement Features
  • Hours, Minutes, Seconds
  • Date
  • Chronometer, Co-Axial Escapement
Case
Red Gold 31mm
Dial Color
White
Crystal
Sapphire
Water Resistance
100

Current Listings

[WTS] Omega Constellation Ref. 1267.15.00 - Diamond Bezel/Gold Bar Bracelet/Textured Dial | Box/Cards

Omega Constellation Ref. 1267.15.00 - Diamond Bezel/Gold Bar Bracelet/Textured Dial | Box/Cards

Omega - 1267.15.00 · $1,400
This is an Omega Constellation Ref. 1267.15.00, featuring a diamond bezel and gold bar bracelet on a textured yellow dial.

  • Condition: Excellent used condition
  • Case diameter: 22.5 mm
  • Water resistance: 30m depth rating
  • Movement type: Quartz precision movement
Posted at
Jan 30, 2026, 11:31 AM
Active
View listing on r/WatchExchange
[WTS] Tropical Dial Omega Pie Pan Constellation 168.005

Tropical Dial Omega Pie Pan Constellation 168.005

Omega - 168.005 · $1,600
For sale is a stunning Tropical dial Omega Pie Pan Constellation watch.

  • Dial type: Tropical dial
Posted at
Jan 29, 2026, 12:06 PM
Active
View listing on r/WatchExchange
[WTS] Redial Omega Pie Pan Constellation 168.005 - Polished case with sharp edges

Redial Omega Pie Pan Constellation 168.005 - Polished case with sharp edges

Omega - 168.005 · $1,600
For sale a beautiful Omega Pie Pan Constellation with Top notch redial quality and Case polished with sharp edges.

  • Redial quality: top notch
  • Shipping options: Fedex/DHL
Posted at
Jan 29, 2026, 12:01 PM
Active
View listing on r/WatchExchange
[WTS] Omega Constellation 🌌 perpetual calendar 📅 blue dial Quartz movement!

Omega Constellation 🌌 perpetual calendar 📅 blue dial Quartz movement!

Omega - Constellation Perpetual Date Black Silver Mens Watch, Stamp code 1551 / 861 · $1,250
This Omega Constellation is a rare quartz perpetual calendar watch with a blue dial. The sunburst dial appears to change color depending on the angle and lighting, ranging from ocean blue to navy blue or blue grey to blue purple.

  • Condition: Runs like new, serviced in 2023
  • Movement: quartz
  • Battery status: new
  • Case material: unknown (assumed metal due to 18k stamp)
Posted at
Jan 28, 2026, 4:29 PM
Active
View listing on r/WatchExchange
[WTS] Omega Constellation Automatic | Stainless Steel and Gold | Reference 1202.30.00

Omega Constellation Automatic | Stainless Steel and Gold | Reference 1202.30.00

Omega - 1202.30.00 · $6,500
Posted at
Jan 28, 2026, 3:35 PM
Active
View listing on r/WatchExchange
[WTS] Vintage Omega Trio – Century / Genève Dynamic / Constellation Quartz

Vintage Omega Trio – Century / Genève Dynamic / Constellation Quartz

Omega - 121001 & 166.039 & 198.0111 · $650
A trio of vintage Omega watches including the Century Ref. 121001 from 1962 with a manual wind Cal. 269 movement and a gold-capped stainless steel caseback.

  • Case material 1: gold-capped
  • Case material 2: stainless steel
  • Dial color 1: beautiful 'Jupiter' patina
Posted at
Jan 28, 2026, 8:27 AM
Active
View listing on r/WatchExchange
[WTS] Omega Constellation Globemaster Annual Calender 130.33.41.22.06.001 Box & Papers

Omega Constellation Globemaster Annual Calender 130.33.41.22.06.001 Box & Papers

Omega - 130.33.41.22.06.001 · $6,599
The Omega Constellation Globemaster Annual Calendar features a sunburst grey dial, applied hour markers, and a clean annual calendar display. It is powered by the Co-Axial Master Chronometer Caliber 8922, delivering outstanding precision and resistance to magnetic fields up to 15,000 gauss.

  • Condition: Great pre-owned condition
  • Movement: in-house Co-Axial Master Chronometer Caliber 8922
  • Bracelet material: stainless steel
Posted at
Jan 27, 2026, 11:44 PM
Active
View listing on r/WatchExchange
[WTS] Omega Constellation 168.005 Dog-leg Lugs Crosshair Tropical Dial — $1,400 (Serviced / Shipping / Tariff Covered)

Omega Constellation 168.005 Dog-leg Lugs Crosshair Tropical Dial — $1,400 (Serviced / Shipping / Tariff Covered)

Omega - 168.005 · $1,400
This Omega Constellation ref. 168.005 features a unique tropical dial with crosshair layout, well-matched hands and hour markers, and dog-leg lugs.

  • Condition: Great vintage condition
  • Movement Type: Automatic
  • Caliber: 561
  • Chronometer Certified: Yes
Posted at
Jan 27, 2026, 8:52 AM
Active
View listing on r/WatchExchange
[WTS] Omega Constellation Pie Pan

Omega Constellation Pie Pan

Omega - Constellation Pie Pan · $1,800
Additional Details: Excellent condition, recently serviced Omega Constellation Pie Pan.

  • Condition: Excellent
  • Servicing status: recently serviced
Posted at
Jan 26, 2026, 5:43 PM
Active
View listing on r/WatchExchange