The Omega Constellation 123.55.31.20.55.003 is a 31mm dress watch built entirely in white gold. It sits at the jewellery end of the Constellation lineup. The diamond-set bezel and mother-of-pearl dial put it firmly in fine-watch territory, not just watch territory.
This review covers what we know from having the piece on the desk. We will walk through the specs, the build, who buys it, and what to check before you commit. Every fact here comes straight from the piece itself.
123.55.31.20.55.003 at a glance
| Specification | Detail |
|---|---|
| Reference | 123.55.31.20.55.003 |
| Model family | Omega Constellation |
| Case size | 31mm |
| Case material | White Gold |
| Dial | White mother-of-pearl with diamond indices |
| Movement | Automatic |
| Bracelet / strap | White Gold |
| Condition | Brand New |
| Asking price at Bizak | $25,999 |
What the specs mean on the wrist
The 31mm case is white gold, not steel, not gold-filled. The bracelet is white gold too. That means the entire package, case and bracelet, is the same precious metal. That is a meaningful weight and cost difference from a steel or two-tone Constellation. The Co-Axial escapement is Omega's own escapement design, built to reduce friction and extend service intervals compared with a standard lever escapement. The movement is automatic, so daily wear keeps it wound.
The dial is white mother-of-pearl. Mother-of-pearl shifts colour in different light, which gives the dial a depth a painted dial cannot match. The indices are set with diamonds. The bezel is set with diamonds too. This is not a token gem accent. It is the primary design statement of the watch. On a 31mm wrist this watch reads as jewellery first and watch second, which is exactly what a buyer in this category is usually looking for.
The dealer’s take
At the desk, people who ask for this reference already know they want white gold. They are not cross-shopping steel. The questions we get are about the diamond quality, the bracelet clasp feel, and whether the mother-of-pearl is consistent across the dial. The answer on the last point is that natural mother-of-pearl will always show some variation. That variation is part of what makes it genuine.
The second set of questions is about Omega's Co-Axial movement and service. Buyers want to know the escapement is a real technical feature, not a marketing label. It is a legitimate engineering choice Omega has used across its lineup for years. Because this piece is brand new, it carries a full manufacturer warranty, which answers most service questions before they start.
What to check before you buy a Constellation
- Confirm new condition and box and papers: A brand-new listing should come with the full manufacturer box, warranty card, and all hang tags intact. Verify the warranty card is blank and undated before purchase.
- Inspect the diamond setting on the bezel: Look at each stone under good light. Check that every stone sits flush and secure with no visible gaps in the setting. A loose stone on a new piece is a quality-control issue worth flagging before sale.
- Check the bracelet clasp and links: White gold bracelets are softer than steel. On a new piece, all links should move freely with no pinching and the clasp should snap shut cleanly with no play.
- Verify the Co-Axial escapement runs cleanly: Ask to see the watch running. A new automatic should show smooth seconds and stable timekeeping right out of the box. If it has sat unworn, a gentle wind or short wear before testing is fair.
Who the 123.55.31.20.55.003 is for
This watch is for the buyer who wants a fine-jewellery-level piece that also tells time with genuine mechanical precision. The 31mm case suits a smaller wrist. The all-white-gold build with diamond bezel and mother-of-pearl dial is a full commitment to that aesthetic, not a halfway step.
Alternatives worth considering
- Omega Constellation 29mm — Shoppers who want the same family but prefer a slightly smaller case cross-shop this one.
- Omega Constellation 35mm — Buyers who want a touch more presence on the wrist look at the larger Constellation references.
Compare them side by side in our Constellation collection or browse every Omega we have in stock.
The Bizak & Co. verdict
Reference 123.55.31.20.55.003 is a clear and honest piece. It does what it says. White gold throughout, diamonds on the bezel and dial, mother-of-pearl centre, Co-Axial movement, brand new. There is no ambiguity about what you are buying.
The asking price at Bizak and Co. is $25,999. If you want to discuss the piece, trade something in, or ask about the warranty, call or email us directly. We have been doing this since 1996 and we are glad to talk it through.
FAQ: 123.55.31.20.55.003
What is the asking price for the Omega Constellation 123.55.31.20.55.003 at Bizak and Co.?
The listed price is $25,999. This piece is brand new and in stock. Contact Bizak and Co. directly to discuss purchase, trade-in, or any other questions.
Is 31mm too small for everyday wear?
The 31mm case is a deliberate size choice for this Constellation. It fits a smaller wrist well and wears as a dress watch rather than a sport watch. The white gold and diamond build reinforces that dress-watch role.
What movement does the Omega Constellation 123.55.31.20.55.003 use?
The watch uses an automatic movement with Omega's Co-Axial escapement. The Co-Axial escapement is designed to reduce friction in the gear train and extend the time between services compared with a conventional lever escapement.
Is this Constellation a good buy?
We will not call any watch a guaranteed good buy. What we can tell you is that this piece is brand new, all white gold, diamond-set, and carries a full manufacturer warranty. Those are the facts. Whether it fits your collection and budget is a conversation best had directly with us at Bizak and Co.
Ready to buy the 123.55.31.20.55.003? See live photos and today’s price ($25,999). Have one to move? Sell or trade it to Bizak & Co.. Here’s why collectors deal with us.
Further reading from the dealer desk: certified pre-owned Omega · the watch-nicknames glossary · our live price checker.
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