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

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Condition: pre-owned working condition
Movement: Cal 1111
Diameter: 35.5mm

Posted at

Apr 4, 2026, 1:05 PM

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Condition: Great Condition (Serviced)
Case size: 34mm
Movement type: Automatic

Posted at

Mar 31, 2026, 11:24 PM

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Case diameter: 35mm
Water resistance: 30m (3 bar)

Posted at

Mar 31, 2026, 7:00 PM

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Condition: Excellent for its age
Movement: cal. 561
Dial condition: Excellent for its age
Serviced: Yes (in November 2025)

Posted at

Mar 31, 2026, 1:00 PM

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Condition: Pre-owned, small age-related wear throughout
Case Size: 33MM
Bracelet Length Stainless: up to 7.5 inches
Bracelet Length Two Tone: just over 7 inches

Posted at

Mar 30, 2026, 9:42 PM

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Omega Constellation Pie Pan 35mm Vintage Automatic Dog Leg 2852 168.005 Two Tone Watch - $1250 SHIPPED

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Condition: pre-owned
Diameter: 35mm
Lug width: 18mm
Strap material: red leather

Posted at

Mar 30, 2026, 8:10 PM

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Condition: Good daily wear
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Posted at

Mar 30, 2026, 6:30 PM

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1959 Omega Constellation ref. 14393 gold capped w/ Cal. 561 – crosshair dial – $1575 shipped

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1959 Omega Constellation ref. 14393 with chronometer-grade Cal. 561 automatic movement, clean original sunburst crosshair dial, and a very honest overall presentation.

Condition: Excellent with honest presentation
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Posted at

Mar 30, 2026, 12:58 PM

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Condition: great shape with minor scuffing on the bracelet
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Bracelet stretch: little to no stretch

Posted at

Mar 30, 2026, 10:08 AM

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