Omega Constellation Constellation Co-Axial 31 White Gold / Diamond / Black Supernova
Reference 123.55.31.20.51.001
About this watch
The Omega Constellation Co-Axial 31 is a masterpiece of luxury watchmaking, combining high-end craftsmanship with breathtaking aesthetics. This stunning timepiece features a white gold case radiating luxury, paired with a black supernova dial that adds an element of depth and intrigue. The gem-set bezel and indexes enhance its elegance, making it a true statement piece. At the heart of this model is the Omega Caliber 8520, renowned for its reliability and precision. With a frequency of 25,200 vibrations per hour, it ensures accuracy and longevity. This automatic movement features a Co-Axial escapement, reducing friction between components and extending the watch's lifespan. The power reserve of 50 hours allows you to take off your watch for extended periods without worrying about it stopping. Despite its luxurious appearance, this watch is surprisingly comfortable to wear, with a rounded case that hugs the wrist. Paired with a white gold bracelet, it complements the case perfectly. With a water resistance of up to 100 meters, this timepiece adapts to your lifestyle, not the other way around! Whether you're attending a gala or enjoying a day out, this watch is perfect for anyone who appreciates the finer things in life.
Key Features
- Omega Caliber 8520 automatic movement
- Co-Axial escapement for reduced friction and increased longevity
- 50-hour power reserve for extended wear
- White gold case with gem-set bezel and indexes
- Black supernova dial with unique texture and reflectivity
- Sapphire crystal glass for durability and scratch resistance
- Water resistance of up to 100 meters
Specifications
- Brand
- Omega
- Family
- Constellation
- Model
- Constellation Co-Axial 31 White Gold / Diamond / Black Supernova
- Reference
- 123.55.31.20.51.001
- Movement
- 8520
- Movement Features
-
- Hours, Minutes, Seconds
- Date
- Chronometer, Co-Axial Escapement
- Case
- White Gold 31mm
- Dial Color
- Black
- Crystal
- Sapphire
- Water Resistance
- 100
Current Listings
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Vintage Omega Constellation Chronometer - 168.0056 - C-Shaped Case - $799 Shipped!
A vintage Omega Constellation Chronometer with a C-shaped case, inspired by Gerald Genta, featuring an automatic movement and date window at 3 o'clock.
- Condition: Good condition with signs of wear
- Case shape: C-Shaped Case
- Case size: 35mm diameter
- Movement type: Automatic
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Rare 1956 Omega Constellation in Rose Gold / SS
This is an older Omega Constellation model from 1956, featuring one of the first automatic 5xx series movements. The watch has a smooth winding mechanism and looks great in natural light.
- Condition: Pre-owned with a scratch on the dial between 1 and 2
- Movement series: 5xx series (automatic)
- Case diameter: 34mm
![[WTS] FULL COLLECTION SALE PT 2: Tiffany Eastwest (now discontinued), Hamilton Intramatic Chronograph 40mm, Baltic Aquascaphe GMT, Longines Legend Diver 36mm Red Dial, Omega Constellation 35mm](https://preview.redd.it/6d74v58i0uye1.jpeg?auto=webp&s=2e9919a49ca828355ab1d176dba93d33aca30a68)
FULL COLLECTION SALE PT 2: Tiffany Eastwest (now discontinued), Hamilton Intramatic Chronograph 40mm, Baltic Aquascaphe GMT, Longines Legend Diver 36mm Red Dial, Omega Constellation 35mm
The seller is listing a collection of five watches for sale, including a Hamilton Intramatic Chronograph, Baltic Aquascaphe GMT, Longines Legend Diver 36mm Red Dial, Omega Constellation 35mm, and Tiffany Eastwest.
- Condition: pristine
- Movement: Soprod C125 GMT
- Case size: 40/20mm
- Crystal: domed sapphire
![[WTS] Omega Constellation. PiePan. Gorgeous Dial.](https://preview.redd.it/go3xk1a1etye1.jpeg?auto=webp&s=e6b5a812cb4c1af3513e7e3a1d0f241589a67a36)
Omega Constellation. PiePan. Gorgeous Dial.
This Omega Constellation features a Pie Pan dial and is an automatic watch. It comes with an AM strap.
- Condition: nice condition
- Case size: 40mm diameter
- Strap material: AM strap
![[WTS] Omega Constellation Co-Axial Chronometer, or, "We have PRX at home"](https://external-preview.redd.it/MVA-emtV8JeBhQ-N8SCDZ4AQZKD6g1dGAdDg2DehcP8.jpg?auto=webp&s=2ecd61efe4fb917d0410b3480a5e96de2aba84a6)
Omega Constellation Co-Axial Chronometer, or, "We have PRX at home"
The Omega Constellation Co-Axial Chronometer features a 35mm case size, Caliber 2500 chronometer movement, and a reverse clous de paris dial.
- Condition: Good (with some hairline scratches)
- Case dimensions: 35mm diameter, 38.4mm lug-to-lug, 10.8mm thickness
- Bracelet size: adjustable to fit a 6.75 inch wrist
- Movement type: Caliber 2500 chronometer, Co-Axial movement
![[WTS] Rare 1959 Omega Constellation w/ Railtrack Dial, Steel Case & Special Chronometer Movement](https://preview.redd.it/kpgaecagqzxe1.jpg?width=640&crop=smart&auto=webp&s=f0ca08586250ecc4ad9654138f812186603c0fc8)
Rare 1959 Omega Constellation w/ Railtrack Dial, Steel Case & Special Chronometer Movement
A rare 1959 Omega Constellation with a railtrack dial and special chronometer movement. The watch has an original non-refinished silver dial with patina and an original stainless steel case with wear.
- Condition: Pre-owned, needs service
- Case size: 34.5mm
- Diameter: 34.5mm
- Movement accuracy: Special chronometer certified with high accuracy

1970s Omega Constellation Ref: 391.0801 Quartz with Box
A 1970s Omega Constellation Ref: 391.0801 Quartz watch in excellent condition, featuring a 32mm stainless steel case and original horizontal grained silver dial.
- Condition: Excellent with very light wear from use
- Case Size: 32mm
- Bracelet Links: 23
- Movement Type: Quartz

2000s Omega Constellation Ref: 1502.30 Automatic
This is a 2000s Omega Constellation Ref: 1502.30 Automatic watch, featuring a 34mm Stainless Steel case and an excellent original silver/white dial.
- Condition: Very nice with some wear from use
- Case Size: 34mm diameter
- Bracelet Links: 21 links (+1 extra)
- Bezel Type: fixed Stainless Steel bezel with recessed Roman Numerals
![[WTS] VintageOmega Constellation Diamond SS/18kt YG](https://preview.redd.it/ujso6c46klxe1.jpg?width=640&crop=smart&auto=webp&s=2cb8065b102b68512e80b92cb8de7594b83c2829)
VintageOmega Constellation Diamond SS/18kt YG
This vintage Constellation features a diamond bezel and dial, with a quartz movement running properly. The watch has a 33.5mm case and fits a 7.5 inch wrist.
- Condition: Good, with some minor flaws (dust under crystal/dial, missing end pieces on links)
- Case Size: 33.5mm
- Wrist Fit: 7.5 inch wrist