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] Omega Constellation Globemaster ref 130.33.39.21.03.001

Omega Constellation Globemaster ref 130.33.39.21.03.001

Omega - 130.33.39.21.03.001 · $4,200
The Omega Globemaster Constellation features a blue pie-pan dial with a matching blue alligator strap and a tungsten coin-edge bezel, powered by Omega's latest cal 8900 Master Chronometer co-axial movement.

  • Condition: excellent pre-owned condition
  • Movement: cal 8900 Master Chronometer co-axial
  • Case size: 39mm diameter
Posted at
Sep 8, 2025, 1:38 PM
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[WTS] 1960 Omega Constellation Calendar Ref. 2943 - Serviced w/ Extras

1960 Omega Constellation Calendar Ref. 2943 - Serviced w/ Extras

Omega - 2943 · $1,450
This is a rare Omega Constellation Calendar, manufactured in 1960, with a caliber 504 movement. It comes with its original papers and two-tone beads of rice bracelet.

  • Condition: Great condition
  • Bracelet Condition: some issues (no end links, lug hole problem)
  • Movement Condition: astonishing condition
  • Box Condition: only outer top present
Posted at
Sep 6, 2025, 1:03 PM
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[WTS] 60s Omega Constellation Chronometer 168.005 | Cal. 564 | Dog Leg lugs, Beads-of-Rice Bracelet, Quickset Date, Onyx Dial | $1560 (SERVICED)

60s Omega Constellation Chronometer 168.005 | Cal. 564 | Dog Leg lugs, Beads-of-Rice Bracelet, Quickset Date, Onyx Dial | $1560 (SERVICED)

Omega - 168.005 · $1,590
A classic 1960s Omega Constellation Chronometer with a clean silver dial and iconic star at 6 o'clock, powered by the accurate Caliber 564 movement.

  • Condition: Excellent vintage condition
  • Movement: Caliber 564 — automatic, 24 jewels, COSC-rated chronometer, quickset date
  • Bracelet: Beads-of-rice bracelet with original links
  • Case dimensions: [object Object]
Posted at
Sep 6, 2025, 9:22 AM
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Vintage Omega Constellation Manhattan Automatic with Date [WTT] [WTS]

Vintage Omega Constellation Manhattan Automatic with Date [WTT]

Omega - 1502.30
A refined and elegant vintage Omega Constellation chronometer-certified automatic wristwatch in stainless steel, featuring an integrated bracelet and slim case profile.

  • Condition: Pre-owned, shows normal wear consistent with age
  • Case material: Stainless steel
  • Bracelet type: Integrated Omega stainless steel
  • Crystal material: Sapphire
Posted at
Sep 5, 2025, 9:37 PM
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[WTS] Omega Constellation 167.005

Omega Constellation 167.005

Omega - 167.005 · $870
The Omega Constellation 167.005 is a 36mm watch featuring the 551 movement, with a nice patina on the dial and an aftermarket bracelet that fits a 6.5in wrist.

  • Condition: Pre-owned with light scratches and wear marks
  • Case size: 36mm
  • Movement type: 551
  • Bracelet type: aftermarket
Posted at
Sep 5, 2025, 11:18 AM
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[WTS] Omega Constellation 167.021 Ultra-Thin Cal. 712 Chronometer – Super Clean, €1000

Omega Constellation 167.021 Ultra-Thin Cal. 712 Chronometer – Super Clean, €1000

Omega - 167.021 · $1,000
A Omega Constellation 167.021 Ultra-Thin Cal. 712 Chronometer in excellent condition.

  • Condition: Super clean
  • Caliber: Cal. 712
Posted at
Sep 4, 2025, 5:34 PM
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[WTS] Omega constellation 1422

Omega constellation 1422

Omega - 1422 · $390
A Omega Constellation ref. 1422 is being sold with a worn condition but still keeping great time.

  • Condition: very worn
  • Shipping: continental US
  • Payment Methods: PayPal, cash (meet in person in Edinburg, Texas)
Posted at
Sep 3, 2025, 4:14 PM
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[WTS] Rare Omega Constellation Jumbo Ref. 168.001 37mm Vertical Brushed Dial for Japanese Market | Good Condition (Serviced) | $1500

Rare Omega Constellation Jumbo Ref. 168.001 37mm Vertical Brushed Dial for Japanese Market | Good Condition (Serviced) | $1500

Omega - 168.001 · $1,500
The Omega Constellation Jumbo Ref. 168.001 is a rare and underrated vintage watch with a 37mm diameter, stainless steel case, and a unique vertical brushed dial.

  • Condition: Good (Serviced)
  • Diameter: 37mm
  • Lug width: 19mm
  • Movement: Caliber 561 (24-jewel chronometer-rated automatic movement)
Posted at
Sep 3, 2025, 2:01 PM
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[WTS] 1973 Omega Constellation Megaquartz Ref. 196.0015 Cal. 1310 - First Omega In-House Quartz Movement | $1100

1973 Omega Constellation Megaquartz Ref. 196.0015 Cal. 1310 - First Omega In-House Quartz Movement | $1100

Omega - 196.0015 · $1,100
1973 Omega Constellation Megaquartz with in-house quartz movement, one of the first of its kind.

  • Movement: Cal. 1310
Posted at
Sep 3, 2025, 1:43 PM
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