Omega Constellation Constellation Co-Axial 31 Stainless Steel / Red Gold / Brown

Reference 123.20.31.20.13.001

About this watch

The Omega Constellation Co-Axial 31 is a stunning blend of sophistication and mechanical excellence, featuring a unique combination of red gold and stainless steel that creates a striking contrast. The rich brown dial adds warmth to any outfit, while the round case (31mm diameter) sits comfortably on the wrist. The sapphire glass ensures scratch resistance, and the open case back showcases Omega's precision engineering. At its heart lies the Omega Caliber 8520, an automatic movement renowned for reliability and performance. This chronometer has undergone rigorous testing to ensure accuracy, with a power reserve of 50 hours and a frequency of 25,200 vibrations per hour. The Co-Axial escapement reduces friction between components, improving accuracy and extending the watch's lifespan. The Omega Constellation Co-Axial 31 provides an elegant display of time and date, with Dauphine hands gliding smoothly across the dial. Its water resistance rating of 100 meters makes it perfect for active lifestyles or spontaneous adventures. The understated elegance allows it to transition seamlessly from day to night, complementing any outfit.
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Key Features

  • Omega Caliber 8520 Automatic Movement
  • Chronometer Accuracy and 50-Hour Power Reserve
  • Sapphire Glass Scratch Resistance
  • Open Case Back for Precision Engineering
  • Red Gold and Stainless Steel Combination
  • 31mm Diameter Round Case
  • Water Resistance up to 100m

Specifications

Brand
Omega
Family
Constellation
Model
Constellation Co-Axial 31 Stainless Steel / Red Gold / Brown
Reference
123.20.31.20.13.001
Movement
8520
Movement Features
  • Hours, Minutes, Seconds
  • Date
  • Chronometer, Co-Axial Escapement
Case
31mm
Dial Color
Brown
Crystal
Sapphire
Water Resistance
100

Current Listings

[WTS] Omega Constellation Manhattan Quartz 1980s $899 Shipped 33MM

Omega Constellation Manhattan Quartz 1980s $899 Shipped 33MM

a quartz-powered Omega Constellation Manhattan from the 1980s, measuring 33mm in diameter.

Posted at
Feb 23, 2026, 10:33 PM
Active
[WTS] Omega Constellation 33mm ref 1512.40 - $799 - DHL

Omega Constellation 33mm ref 1512.40 - $799 - DHL

Omega - 1512.40 · $799
This Omega Constellation is a quartz-powered watch with an original case and bracelet, measuring 33mm in diameter.

  • Condition: Good (9/10)
  • Movement: Quartz
  • Case dimensions: 33mm diameter
  • Bracelet type: Original
Posted at
Feb 23, 2026, 10:42 AM
Active
[WTS] Omega Constellation Pie Pan

Omega Constellation Pie Pan

A well-maintained Omega Constellation Pie Pan watch available for sale.

  • Condition: Very clean example!
Posted at
Feb 19, 2026, 6:39 PM
Active
[WTS](CONUS) Omega Constellation 168.047 - Vintage 1970s - Priced to Sell - Serviced - $750

(CONUS) Omega Constellation 168.047 - Vintage 1970s - Priced to Sell - Serviced - $750

Omega - 168.047 · $750
This Omega Constellation ref 168.047 is a vintage watch from the 1970s with a replaced dial, hands, crystal, and gasket. The case has superficial scratches, but the rest of the watch is in good condition.

  • Condition: Very good
  • Case Size: 40mm x 33mm
  • Movement Calibre: 1001
  • Movement Accuracy: +/- 15 secs a day
Posted at
Feb 19, 2026, 5:35 PM
Active
[WTS] Omega Steel ‘Pie Pan’ Constellation Dog-Legged Lugs Onyx Markers - Ref. 168.005 - Caliber 561 Automatic Date - From 1966 - $2500 Shipped, Duties Covered

Omega Steel ‘Pie Pan’ Constellation Dog-Legged Lugs Onyx Markers - Ref. 168.005 - Caliber 561 Automatic Date - From 1966 - $2500 Shipped, Duties Covered

Omega - 168.005 · $2,500
This Omega Constellation 'Pie Pan' features a steel case with sunburst dial, automatic movement with date, dog-legged lugs, and inlaid black onyx markers. The watch has been recently serviced and comes paired with a new textured calf-leather strap.

  • Condition: Excellent, well-preserved
  • Case Size: 35mm diameter
  • Movement Caliber: 561 Automatic Date
  • Dial Color: White sunburst
Posted at
Feb 19, 2026, 9:23 AM
Active
[WTS] Omega Constellation Ref 168.017 - Vintage

Omega Constellation Ref 168.017 - Vintage

Omega - 168.017 · $1,550
1966 Omega Constellation Ref 168.017 with White Pearl Dial Caliber 564, in great condition and fully functional.

  • Condition: GREAT condition
  • Year Of Manufacture: 1966
  • Material: Gold-cap on Stainless Steel
  • Thickness: 200 microns (greater resistance and durability)
Posted at
Feb 19, 2026, 4:30 AM
Active
[WTS] Omega Constellation Ref 166.063 - Vintage

Omega Constellation Ref 166.063 - Vintage

Omega - 166.063 · $1,250
1960s Omega Constellation in good condition, featuring Caliber 1001 and a gold-cap on stainless steel case.

  • Condition: good condition
  • Year Of Manufacture: 1960s
  • Case Material: Gold-cap on Stainless Steel
  • Water Resistance: 200 microns
Posted at
Feb 17, 2026, 5:17 PM
Active
[WTS] Omega Constellation Jumbo Ref : 168.001 14K Gold Bezel Condition Good Price : 2000$

Omega Constellation Jumbo Ref : 168.001 14K Gold Bezel Condition Good Price : 2000$

Omega - 168.001 · $2,000
This Omega Constellation Jumbo features a 14K gold bezel and is in good condition, measuring 37mm in size with an original dial powered by the Caliber 561 movement.

  • Condition: Good
  • Material: 14K Gold Bezel
  • Diameter: 37mm
  • Calibre: Caliber 561
Posted at
Feb 17, 2026, 6:00 AM
Active
Omega Constellation Globemaster Master Chronometer

Omega Constellation Globemaster Master Chronometer

The Omega Constellation Globemaster 39mm is a versatile dress watch with a dark blue pie pan dial and fluted tungsten carbide bezel. It has goldilocks proportions and a beautiful 3-row bracelet.

  • Condition: 98% pristine, minor hairline marks on lugs and possibly a faint desk diving mark on case or bracelet
  • Case dimensions: 39mm x 46.7mm lug to lug x 12.6mm thick
  • Bracelet type: 3-row with slightly curved central links
Posted at
Mar 31, 2025, 10:32 AM
Active