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

Reference 123.20.31.20.13.001

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

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 Globemaster Annual Calendar Box & Papers

Omega Constellation Globemaster Annual Calendar Box & Papers

Omega - Constellation Globemaster Annual Calendar · $5,500
The Omega Constellation Globemaster Annual Calendar features a sunburst grey dial, applied hour markers, and a clean annual calendar display powered by the in-house Co-Axial Master Chronometer Caliber 8922.

  • Condition: Great pre-owned condition with light signs of careful wear
  • Case size: 41mm
  • Material: stainless steel
  • Bracelet material: stainless steel
Posted at
Mar 22, 2026, 12:30 PM
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[WTS] 1963 Omega Constellation Ref. 168.005 | Onyx Markers | Dog Legs Lugs | All Original | only $1400 (SERVICED)

1963 Omega Constellation Ref. 168.005 | Onyx Markers | Dog Legs Lugs | All Original | only $1400 (SERVICED)

Omega - 168.005 · $1,400
This 1963 Omega Constellation is powered by a chronometer-rated Caliber 561 movement and features an all-original configuration with stainless steel case, date at 3 o'clock, and onyx markers.

  • Condition: some hairlines but case remains sharp; dial has some light spotting
  • Movement: Caliber 561, chronometer-rated automatic
  • Case material: stainless steel
  • Dimensions: [object Object]
Posted at
Mar 22, 2026, 10:57 AM
Active
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[WTS] Omega Constellation Ref. 168.003 With “Dog-Leg” Lugs | Good Condition (Serviced) | $2250

Omega Constellation Ref. 168.003 With “Dog-Leg” Lugs | Good Condition (Serviced) | $2250

Omega - 168.003 · $2,250
The Omega Constellation Ref. 168.003 features a beautifully balanced silver dial and highly sought-after dog-leg lug case, measuring 34.5mm in stainless steel with a 40mm lug-to-lug length.

  • Condition: Good, serviced condition
  • Case dimensions: 34.5mm diameter (stainless steel), 40mm lug-to-lug length, 18mm lug width
  • Movement: Omega Caliber 561 (chronometer-certified)
  • Crystal type: Plexiglass crystal (correct to the period)
Posted at
Mar 22, 2026, 12:50 AM
Active
View listing on r/WatchExchange
[WTS] Omega Constellation Manhattan 168.0075 18k Bezel Two Tone Watch 35.5mm - $1300 SHIPPED

Omega Constellation Manhattan 168.0075 18k Bezel Two Tone Watch 35.5mm - $1300 SHIPPED

Omega - 168.0075 · $1,300
Up for sale is this stunning Omega Constellation Manhattan Automatic watch, with a gold champagne dial and a classic vintage dress watch design.

  • Condition: Great mechanical condition
  • Case size: 35.5mm diameter
  • Material: Stainless steel and solid 18k yellow gold
  • Movement: Omega Cal 1111
Posted at
Mar 21, 2026, 8:05 PM
Active
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[WTS] Omega Constellation Kalekadora Mini Ladies 1535.73, Factory Diamonds, W/ Card

Omega Constellation Kalekadora Mini Ladies 1535.73, Factory Diamonds, W/ Card

Omega - 1535.73 · $999
The Omega Constellation Kalekadora Mini is a ladies' watch featuring a pink mother-of-pearl dial and a diamond bezel.

  • Condition: Excellent condition
  • Case size: ~17x23mm
  • Movement: Quartz
  • Dial color: Pink MOP
Posted at
Mar 21, 2026, 12:47 PM
Active
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[WTS] Excellent Omega Steel ‘Pie Pan’ Constellation Dog-Legged Lugs Onyx Markers - Ref. 168.005 - Caliber 561 Automatic Date - From 1966 - $2500 Shipped & Duties Covered

Excellent 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
A stunning Omega Constellation 'Pie Pan' with a sunburst dial and caliber 561 automatic movement. The case is sharp and retains its original beveled angles, and the observatory emblem on the case is crisp.

  • Condition: Excellent, unpolished
  • Movement: Caliber 561 Automatic Date
  • Case size: 35mm (excluding crown)
  • Water resistance: Not specified
Posted at
Mar 21, 2026, 11:56 AM
Active
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[WTS] 1962 Omega Constellation ref. 14777 Chronometer Cal. 531 w/ crosshair dial and BOR braclet - 'Jumbo' 37mm case - $1250 shipped

1962 Omega Constellation ref. 14777 Chronometer Cal. 531 w/ crosshair dial and BOR braclet - 'Jumbo' 37mm case - $1250 shipped

Omega - 14777 · $950
This 1962 Omega Constellation ref. 14777 features a 37mm stainless-steel case, chronometer-rated cal. 561 movement, and an original champagne dial with crosshair design.

  • Condition: Shows signs of wear and past polish, but still presents well on wrist
  • Case Size: 37mm
  • Diameter Excluding Crown: true
  • Lug Shape: decent
Posted at
Mar 18, 2026, 9:06 AM
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[WTS] 2025 Omega Constellation 41mm Steel Meteorite Dial 131.30.41.21.99.001 Full Set

2025 Omega Constellation 41mm Steel Meteorite Dial 131.30.41.21.99.001 Full Set

Omega - 131.30.41.21.99.001 · $6,850
This Omega Constellation features a 41mm stainless steel case, black ceramic bezel with liquid metal Roman numerals, meteorite dial with black PVD hands & markers, and a stainless steel bracelet. The watch is from 2025 and comes in full set condition.

  • Condition: Nice preowned condition with some light scratches on the case and bracelet.
  • Case material: stainless steel
  • Bezel material: black ceramic
  • Dial description: meteorite dial
Posted at
Mar 17, 2026, 6:55 PM
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[WTS] Omega Constellation Chronometer Quartz with Original Bracelet for sale $599 - Shipped

Omega Constellation Chronometer Quartz with Original Bracelet for sale $599 - Shipped

Omega - Constellation Chronometer Quartz · $599
a quartz-powered Omega Constellation with a stainless steel case and original bracelet for sale

  • Bracelet size limit: up to 6.7 inches
  • Case diameter: 25.6mm
Posted at
Mar 17, 2026, 5:03 PM
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View listing on r/WatchExchange