Omega Constellation Constellation Co-Axial 31 Stainless Steel / MOP

Reference 123.10.31.20.05.001

Omega Constellation Co-Axial 31 Stainless Steel / MOP

About this watch

The Omega Constellation Co-Axial 31 Stainless Steel / MOP is a masterpiece of luxury watchmaking, boasting a stunning round shape with a diameter of 31 mm. The polished stainless steel case radiates sophistication, while the mesmerizing mother of pearl dial shifts colors depending on the light. This certified chronometer features an automatic movement (Omega caliber 8520) with a frequency of 25,200 vibrations per hour and a power reserve of up to 50 hours. With its versatility, exceptional design, and reliable movement, this timepiece is perfect for dressing up or casual wear. Its robust water resistance of 100 meters ensures it can withstand splashes of water or a day at the beach. As an investment in quality, craftsmanship, and timeless design, the Omega Constellation Co-Axial 31 is a worthy luxury watch that will stand the test of time.
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MSRP: $6,300
Market Price: $2,253

Key Features

  • Automatic movement (Omega caliber 8520)
  • Polished stainless steel case
  • Mesmerizing mother of pearl dial
  • Certified chronometer
  • Water resistance of 100 meters
  • Power reserve up to 50 hours
  • Robust and durable design

Specifications

Brand
Omega
Family
Constellation
Model
Constellation Co-Axial 31 Stainless Steel / MOP
Reference
123.10.31.20.05.001
Movement
8520
Movement Features
  • Hours, Minutes, Seconds
  • Date
  • Chronometer, Co-Axial Escapement
Case
Stainless Steel 31mm
Dial Color
White
Crystal
Sapphire
Water Resistance
100

Current Listings

[WTS] Omega constellation chronometer ref 198.0104 & Omega Polaris Ref 396.1022.

Omega constellation chronometer ref 198.0104 & Omega Polaris Ref 396.1022.

Omega · $700
The seller is listing two vintage Omega watches: a Constellation chronometer quartz (ref 198.0141) and an Omega Polaris (ref 396.1022). Both watches are from the 1980s, feature sapphire crystals, and have strap sizes up to 7.5 inches.

  • Condition: very close to perfect
  • Case size: 29mm without crown x 33mm
  • Movement: Omega Cal: 1431 Quartz
  • Crystal type: Sapphire Crystal
Posted at
Feb 12, 2026, 8:29 AM
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[WTS] Omega Constellation Jumbo 14777-61SC 37mm | Good Condition (Serviced) | $1600

Omega Constellation Jumbo 14777-61SC 37mm | Good Condition (Serviced) | $1600

Omega - 14777-61SC · $1,600
The Omega Constellation Jumbo Ref. 14777-61SC is a vintage watch with a clean, flat dial aesthetic and a modern wrist presence. It features a stainless steel case with beautifully curved lugs and a sharp bezel, and powers Omega's Caliber 561 chronometer-rated automatic movement.

  • Condition: Good (serviced)
  • Case diameter: 37mm
  • Lug width: 19mm
  • Movement: Caliber 561 (chronometer-rated automatic movement with date complication)
Posted at
Feb 10, 2026, 11:15 PM
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[WTS] OMEGA Constellations Chronometer Certified 168.018 original bracelet, excellent condition

OMEGA Constellations Chronometer Certified 168.018 original bracelet, excellent condition

OMEGA - 168.018 · $1,500
This Omega Constellation Chronometer is a certified timepiece featuring an automatic Cal 564 movement and a stainless steel case with a silver dial.

  • Condition: excellent
  • Case dimensions: 35 x 40mm, thickness 12mm, 19mm lug width
  • Movement: Cal 564 Automatic 24 Jewels 19800 beats per hour
  • Accuracy: +/-5s per day
Posted at
Feb 9, 2026, 10:08 PM
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[WTS] OMEGA Constellations Chronometer certified 167.021, serviced

OMEGA Constellations Chronometer certified 167.021, serviced

OMEGA - 167.021 · $1,300
A rare Omega Constellation Chronometer model 167.021, officially certified and ultra thin, featuring a silver dial and automatic movement.

  • Condition: Used with normal signs of wear and use
  • Case dimensions: 33 x 39mm, 8mm thickness, 19mm lug width
  • Movement type: Cal 712 Automatic, 24 Jewels, 19800 beats per hour
  • Crystal condition: Acrylic Crystal with no scratches and Omega signed in the center
Posted at
Feb 8, 2026, 8:50 AM
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[WTS] 10k Gold Filled Omega Constellation. STEAL DEAL

10k Gold Filled Omega Constellation. STEAL DEAL

Omega - Constellation · $555
This vintage Omega Constellation is a mid-century design in a classic 34mm case that exudes Swiss elegance.

  • Case size: 34mm
Posted at
Feb 6, 2026, 10:59 PM
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[WTS] Omega Double Eagle Constellation | Open Case Back Chronograph | Reference 1819.51.91

Omega Double Eagle Constellation | Open Case Back Chronograph | Reference 1819.51.91

Omega - 1819.51.91 · $4,900
This Omega Double Eagle Constellation features an open case back showcasing the movement, with a 41MM case size and powered by Co-Axial calibre 3313.

  • Condition: Excellent Pre-Owned
  • Case size: 41MM
  • Crystal status: replaced
  • Strap type: OEM rubber strap
Posted at
Feb 6, 2026, 2:50 PM
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[WTS] Omega Double Eagle Constellation | Open Case Back Chronograph | Reference 1819.51.91

Omega Double Eagle Constellation | Open Case Back Chronograph | Reference 1819.51.91

Omega - 1819.51.91
a Omega Double Eagle Constellation watch with an open case back chronograph, details to be specified.

  • Case back type: Open Case Back
Posted at
Feb 6, 2026, 2:47 PM
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[WTS] Omega Constellation Pie Pan 168.005 w/bracelet | All original | $2500 shipped (SERVICED)

Omega Constellation Pie Pan 168.005 w/bracelet | All original | $2500 shipped (SERVICED)

Omega - 168.005 · $2,500
A classic mid-60s Constellation with an iconic pie-pan dial and stainless steel case, powered by Omega's chronometer-rated Caliber 561.

  • Condition: All original
  • Movement caliber: Cal. 561 Automatic
  • Case material: Stainless Steel
  • Bracelet type: Original Omega bracelet
Posted at
Feb 6, 2026, 11:22 AM
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[WTS] Mint Omega Gold-Capped Constellation White Sunburst Dial - Ref. 168.018 - Caliber 564 Chronometer Automatic Date - From 1969 - $2300 Shipped, Duties Covered!

Mint Omega Gold-Capped Constellation White Sunburst Dial - Ref. 168.018 - Caliber 564 Chronometer Automatic Date - From 1969 - $2300 Shipped, Duties Covered!

Omega - 168.018 · $2,300
This Omega Constellation features a gold-capped case with a crisp sunburst dial and thick hour markers at the quarters. The watch has a 35mm diameter (excluding the crown) and is powered by an excellent caliber 564 automatic movement with date.

  • Condition: Mint, likely new-old-stock
  • Movement caliber: 564 Chronometer Automatic Date
  • Case dimensions: 35mm diameter excluding crown
  • Lug type: straight lugs
Posted at
Feb 5, 2026, 1:28 PM
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