Omega Constellation Constellation Co-Axial 31 Stainless Steel / Red Gold / MOP

Reference 123.20.31.20.55.001

Omega Constellation Co-Axial 31 Stainless Steel / Red Gold / MOP

About this watch

The Omega Constellation Co-Axial 31 is a masterpiece of luxury watchmaking, blending classic elements with contemporary flair. This stunning timepiece features a 31.00 mm round case crafted from the finest materials, ensuring durability while maintaining an air of elegance. The mother of pearl (MOP) dial is a standout feature, reflecting light beautifully and giving the watch a unique character that changes with the angle of view. The elegant dauphine hands glide effortlessly across the dial, adding a touch of grace to the overall aesthetic. At its heart lies the Omega caliber 8520, an automatic movement certified by the Swiss Official Chronometer Testing Institute (COSC) for precision and performance. With a power reserve of 50 hours, this watch is built to last, ensuring you can trust the time displayed on your wrist. The Co-Axial escapement minimizes friction between components, resulting in enhanced longevity and improved timekeeping accuracy. Whether you're dressing up for a formal event or looking for a stylish accessory for everyday wear, this watch elevates your look with its blend of sophistication and elegance.

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Key Features

Omega caliber 8520 automatic movement
Mother of pearl (MOP) dial with gem-set indexes
Red Gold and Stainless Steel case
100 meters water resistance
Chronometer certification by COSC
Co-Axial escapement for improved accuracy

Specifications

Brand

Omega

Family

Constellation

Model

Constellation Co-Axial 31 Stainless Steel / Red Gold / MOP

Reference

123.20.31.20.55.001

Movement

8520

Movement Features

Hours, Minutes, Seconds
Date
Chronometer, Co-Axial Escapement

Case

31mm

Dial Color

White

Crystal

Sapphire

Water Resistance

100

Current Listings

1969 Omega Constellation ref. 168.029 w/ Cal. 751 – linen dial, WG bezel, original brick bracelet, fresh service – $1,350 shipped

Omega - 168.029 · $1,350

This is a 1969 Omega Constellation ref. 168.029 with a silver linen dial and original white gold fluted bezel. It has an all-original example with its correct bracelet and unpolished case.

Condition: Good, with hairline scratches from normal wear
Movement: Omega chronometer Cal. 751 day-date
Case size: 34.5mm diameter
Lug width: 19mm

Posted at

Mar 25, 2026, 10:45 AM

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Wallet Friendly Integrated Day Dates! Omega Constellation Manhattan Stainless & Two Tone

Omega - Constellation Manhattan Day-Date · $1,150

A pair of Omega Constellation Manhattan Day-Date watches in stainless steel and two-tone variants. Both feature crisp white dials, luminescent hands, and gold dot markers. The cases are 33MM with oversized bezels and integrated bracelets, giving a larger wear than expected.

Condition: Pre-owned, unpolished with some age-related wear and patina forming
Case Diameter: 33mm
Bracelet Length: [object Object]
Movement Type: Swiss automatic with quickset date

Posted at

Mar 23, 2026, 9:35 PM

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omega constellation deluxe ref. 2853 in 18K rose gold. Serviced. $6500 no trades.

Omega - 2853 · $6,500

Material: 18K rose gold

Posted at

Mar 23, 2026, 7:53 PM

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Omega Constellation Double Eagle Chronograph 41mm Reverse Panda Ref. 1819.51.91 - Co-Axial Cal. 3313

Omega - 1819.51.91 · $2,175

This Omega Constellation Double Eagle Chronograph features a 41mm stainless steel case, black dial, and automatic chronometer-certified movement with Co-Axial escapement. It has a reverse panda look and comes on an original integrated black rubber strap.

Condition: Solid, honest condition with superficial wear and light scratches
Case size: 41mm stainless steel
Diameter: 41mm
Bezel: black aluminum Roman numeral

Posted at

Mar 22, 2026, 8:48 PM

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Omega Constellation Globemaster Annual Calendar Box & Papers

Omega - Constellation Globemaster Annual Calendar · $5,500

The Omega Constellation Globemaster Annual Calendar features a sunburst grey dial, applied hour markers, and a clean annual calendar display powered by the in-house Co-Axial Master Chronometer Caliber 8922.

Condition: Great pre-owned condition with light signs of careful wear
Case size: 41mm
Material: stainless steel
Bracelet material: stainless steel

Posted at

Mar 22, 2026, 12:30 PM

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1963 Omega Constellation Ref. 168.005 | Onyx Markers | Dog Legs Lugs | All Original | only $1400 (SERVICED)

Omega - 168.005 · $1,400

This 1963 Omega Constellation is powered by a chronometer-rated Caliber 561 movement and features an all-original configuration with stainless steel case, date at 3 o'clock, and onyx markers.

Condition: some hairlines but case remains sharp; dial has some light spotting
Movement: Caliber 561, chronometer-rated automatic
Case material: stainless steel
Dimensions: [object Object]

Posted at

Mar 22, 2026, 10:57 AM

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Omega Constellation Ref. 168.003 With “Dog-Leg” Lugs | Good Condition (Serviced) | $2250

Omega - 168.003 · $2,250

The Omega Constellation Ref. 168.003 features a beautifully balanced silver dial and highly sought-after dog-leg lug case, measuring 34.5mm in stainless steel with a 40mm lug-to-lug length.

Condition: Good, serviced condition
Case dimensions: 34.5mm diameter (stainless steel), 40mm lug-to-lug length, 18mm lug width
Movement: Omega Caliber 561 (chronometer-certified)
Crystal type: Plexiglass crystal (correct to the period)

Posted at

Mar 22, 2026, 12:50 AM

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