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.

Buy Now on Jomashop

This is an affiliate link

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

Omega Constellation C Case 168.017 Cal 564, Serviced - $790

Omega - 168.017 Cal 564 · $790

Up for sale is my Omega Constellation C Case 168.017 Cal 564 in good condition, featuring a 35-36mm case size.

Condition: Good condition with some signs of aging
Case Size: 35-36mm
Bezel Condition: High polished with light hairlines
Caseback Condition: Polished by previous owner

Posted at

Dec 18, 2025, 8:42 PM

Active

View listing on r/WatchExchange

Omega Constellation 196.0071 – FaceTime / other Verification Available – $200 Shipped

Omega - 196.0071 · $200

The Omega Constellation 196.0071 is being sold, with the seller offering FaceTime or other verification methods.

Verification method: FaceTime / other

Posted at

Dec 18, 2025, 1:07 PM

Active

View listing on r/WatchExchange

Omega Constellation 18K Rose Gold Silver Pie Pan Dial 1960

Omega - 14393 · $5,575

This is a rare 1960s Omega Constellation in 18K rose gold with a silver pie-pan dial. The watch has a unique character and classic proportions, suitable for both men and women.

Condition: Beautiful condition with strong, well-defined edges and an exceptionally clean period-correct pie-pan silver dial.
Case Size: 34mm
Year: 1960s
Material: 18K rose gold

Posted at

Dec 17, 2025, 5:47 PM

Active

View listing on r/WatchExchange

Omega Constellation Globemaster – New – 2025

Omega - 130.33.39.21.02.001 · $4,950

The Omega Constellation Globemaster features a modern design with a coin-edge bezel and classic pie-pan dial inspired by original Constellation models of the 1950s, powered by Omega's Co-Axial Master Chronometer Caliber 8900.

Condition: Unworn/New
Case size: 39mm
Material: stainless steel
Diameter: 39mm

Posted at

Dec 16, 2025, 12:54 PM

Active

View listing on r/WatchExchange

Omega Constellation 2-Tone Automatic 🇨🇭

Omega - Constellation Automatic (no reference number provided) · $1,000

This beautiful Omega Constellation Automatic is a 2-tone stainless steel and gold watch with a matching gold dial. It has a stainless steel bracelet that can fit wrists up to 8 inches in diameter.

Condition: Great condition with minor signs of wear
Case diameter: 35mm (without crown)
Lug to lug: 38mm
Lug width: 23mm

Posted at

Dec 14, 2025, 9:08 PM

Active

View listing on r/WatchExchange

Omega Constellation 168.017 (1966)

Omega - 168.017 · $900

This Omega Constellation features a beautiful original 'C-Shape' dial and is accompanied by its genuine Omega 518 brick bracelet.

Condition: Good condition overall
Movement: Cal. 561
Bracelet: Genuine Omega 518 brick bracelet

Posted at

Dec 12, 2025, 10:03 AM

Active

View listing on r/WatchExchange

REDUCED Omega Constellation Gold Cap ( REF:168.018 ) $750 Shipped.....

Omega - 168.018 · $750

A beautiful example of the classic Omega Constellation Automatic Chronometer from the late 1960s. It features an original silver sunburst dial with applied gold markers and date at 3 o'clock, a gold-capped stainless steel case (34mm), and an iconic Observatory medallion on the caseback.

Condition: Excellent condition, freshly serviced
Case size: 34mm diameter
Movement: Caliber 561
Crystal: Acrylic crystal

Posted at

Dec 12, 2025, 8:28 AM

Active

View listing on r/WatchExchange

OMEGA Constellation Ref. 123.20.35.20.06.001 Yellow Gold Two-Tone - COMPLETE SET!

OMEGA - 123.20.35.20.06.001 · $3,250

The OMEGA Constellation Ref. 123.20.35.20.06.001 is a sophisticated timepiece that celebrates the enduring legacy of OMEGA's iconic Constellation collection, featuring a distinctive stainless steel and yellow gold case with Roman numerals on a polished bezel.

Condition: VERY GOOD, with some light scratches on bracelet
Case material: stainless steel and yellow gold
Bracelet size: ~7" wrist

Posted at

Dec 12, 2025, 1:09 AM

Active

View listing on r/WatchExchange