Omega Constellation Constellation Co-Axial 31 Red Gold / MOP

Reference 123.50.31.20.05.001

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.

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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

Omega Steel ‘Pie Pan’ Constellation Dog-Legged Lugs - Ref. 168.005 - Caliber 561 Automatic Date - From 1968 - $2200

Omega - 168.005 · $2,200

The Omega Constellation 'Pie Pan' features a robust caliber 561 automatic movement with date, sunburst dial, and signature dog-legged lugs. It has a great construction and feel to the well-defined case design, making it an excellent dressy statement piece.

Condition: Excellent, minor patina on logo and date window
Case size: 35mm (excluding crown)
Diameter: 40mm
Movement: Caliber 561 automatic date

Posted at

Jan 26, 2026, 1:13 PM

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Omega Constellation C Shape - 168.017 Circa 1969 only for 775$ Shipped 🚢

Omega - 168.017 · $775

This Omega Constellation C Shape from 1969 features a stainless steel case with a 35mm diameter and an off-white dial.

Condition: Great (minor hairline scratches on case, little signs of aging on dial)
Case Size: 35mm
Movement: Automatic calibre 564
Crystal: Signed Omega crystal

Posted at

Jan 26, 2026, 8:08 AM

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View listing on r/WatchExchange

1966 Omega Constellation “Hidden Crown” ref. 168.004 (Cal. 561) – serviced Jun 2025 – $675 shipped

Omega - 168.004 · $675

A 1966 Omega Constellation ref. 168.004 with the sleek hidden crown case design, powered by the correct Omega Cal. 561 chronometer movement. The dial is original but shows signs of a past cleaning attempt. The watch has been serviced in June 2025.

Condition: Dial: original but shows signs of a past cleaning attempt; Case: original case, likely unpolished with honest scratches from normal wear. Movement serviced June 2025.
Case size without crown: 35mm
Movement caliber: Omega Cal. 561
Crystal type: new aftermarket replacement

Posted at

Jan 26, 2026, 7:57 AM

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Omega Constellation Globemaster Master Chronometer

Omega - 130.30.39.21.03.001 · $4,650

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

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View listing on RolexForums