Omega Constellation Constellation Co-Axial 31 Yellow Gold / MOP

Reference 123.50.31.20.05.002

About this watch

The Omega Constellation Co-Axial 31 Yellow Gold / MOP is a stunning watch that embodies luxury, with its 31mm round case and exquisite mother-of-pearl dial. The self-winding movement features a Co-Axial escapement, known for enhancing precision, stability, and durability. The watch has a generous power reserve of 50 hours and is water-resistant up to 100 meters, making it suitable for swimming and shallow diving. The sapphire crystal glass is scratch-resistant, ensuring the watch maintains its pristine appearance even with daily wear. The open case back showcases the intricate workings of the movement, adding a luxurious finish. Comfortable to wear due to its well-designed bracelet, this watch adapts effortlessly to any setting, from formal events to casual days out.

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MSRP: $24,100

Market Price: $10,224

Key Features

31mm round yellow gold case
Exquisite mother-of-pearl dial with stick and dot indexes
Dauphine hands for a touch of sophistication
Sapphire crystal glass for scratch-resistance
Water-resistant up to 100 meters
50-hour power reserve self-winding movement
Co-Axial escapement for enhanced precision and durability

Specifications

Brand

Omega

Family

Constellation

Model

Constellation Co-Axial 31 Yellow Gold / MOP

Reference

123.50.31.20.05.002

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

Omega Constellation 33mm 18kYG 166052/168033

Omega - 166052/168033 · $4,100

A Omega Constellation watch with a 33mm case size, available for sale.

Case Diameter: 33mm
Lug To Lug: 39mm
Lug Width: 19mm

Posted at

Mar 13, 2026, 2:51 PM

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Omega Constellation Pie Pan Steel Ref. 168.005 | Great Dial, Sharp Case | Dog-leg Lugs | All Original | $2400 (SERVICED)

Omega - 168.005 · $2,400

This vintage Omega Constellation has a 'Pie Pan' dial with faceted edges and bold applied markers, making it a design icon of the mid-century era.

Condition: Serviced, excellent condition
Case Diameter: 34mm
Thickness: ~11mm
Lug To Lug: 43.5mm

Posted at

Mar 13, 2026, 12:00 PM

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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

This is a classic Omega Constellation 'Pie Pan' in steel with a sunburst dial, running the caliber 561 automatic movement.

Condition: Excellent, unpolished and untouched with only light honest marks
Movement: Caliber 561 automatic date
Case size (excluding crown): 35mm
Lug style: Dog-legged lugs

Posted at

Mar 12, 2026, 11:20 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 design with a sunburst dial and thick hour markers. The watch is in exceptional condition with no flaws, retaining its original brushing and textures.

Condition: Mint, new-old-stock
Movement: Caliber 564 Chronometer Automatic Date
Size: 35mm diameter (excluding the crown)
Year: 1969

Posted at

Mar 12, 2026, 11:19 AM

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1971 Omega Constellation ref. 168.0056 w/ Cal. 1011 on original Omega brick bracelet – clean original dial – $1,250 shipped

Omega - 168.0056 · $1,250

A vintage Omega Constellation ref. 168.0056 from 1971, powered by the Cal. 1011 automatic movement and featuring a clean original dial, unpolished C-case, and original Omega brick bracelet.

Condition: Pre-owned with minor hairline scratches on the case
Movement: Omega Cal. 1011 automatic, chronometer-certified
Case size: 35mm without crown
Lug width: 19mm

Posted at

Mar 12, 2026, 8:42 AM

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[WTS] Omega 2852-11-SC — Constellation Chronometer Arrowhead & Flat-Domed Crosshair Dial (1958) — Cal. 505 (Fresh Service) — Original BoR Bracelet — $2,400 Shipped

Omega 2852-11-SC — Constellation Chronometer Arrowhead & Flat-Domed Crosshair Dial (1958) — Cal. 505 (Fresh Service) — Original BoR Bracelet — $2,400 Shipped

Omega - 2852-11-SC · $2,200

This Omega Constellation ref. 2852-11-SC features a classic early Constellation design with an arrowhead dial and is powered by the chronometer-certified Cal. 505 automatic movement. The watch comes on its original beads-of-rice bracelet.

Condition: Pre-owned, with honest signs of wear consistent with age
Case Size: 34.5mm x 42mm diameter
Thickness: 11.5mm
Lug Width: 18mm

Posted at

Mar 11, 2026, 10:17 PM

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Omega Constellation Globemaster Annual Calendar Box & Papers

Omega - Constellation Globemaster Annual Calendar · $60,000

The Omega Constellation Globemaster Annual Calendar features a sunburst grey dial with applied hour markers and a fluted bezel. It is powered by the Co-Axial Master Chronometer Caliber 8922, delivering outstanding precision and resistance to magnetic fields up to 15,000 gauss.

Condition: Great pre-owned condition with light signs of careful wear
Movement caliber: Co-Axial Master Chronometer Caliber 8922
Bracelet material: stainless steel

Posted at

Mar 9, 2026, 9:39 AM

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