A fake Omega Constellation 131 is a replica of the Omega Constellation line whose product code starts with 131, the digit block Omega uses to group a case and bracelet family. Most replicas sold under that label fall into three tiers: quartz copies under $100, mid-tier automatics around $200 to $350, and Swiss-movement builds from $450 up. What separates them is the movement, the case finishing, and how the dial is printed.

What does the "131" in the reference number mean?

Omega writes product codes as blocks of digits. The opening block names the case and bracelet setup, so 131 points to a specific Constellation family rather than one single watch.

The blocks that follow describe case size, dial material, and metal finish. Two watches can share the 131 opening and still differ in diameter, dial color, and whether the bracelet is steel or two-tone.

That is why a listing that says "Constellation 131 replica" tells you little on its own. Ask for the full reference the replica copies, then compare it against the genuine spec.

How close is a top replica to the genuine Constellation 131?

The best replicas start with dimensions. Case diameter, thickness, lug width, and crown position sit within a fraction of a millimeter of the real watch.

Finishing comes next. Good factories brush the case flanks and polish the bezel and claws as separate steps, which is what creates the contrast you see on the genuine piece. Cheaper builds polish everything, and the watch looks flat under light.

The last gap is the movement. Replicas run quartz, cloned automatic movements, or Swiss ETA and Sellita movements. Only the top tier gets a Swiss movement, and that is where most of the price sits.

Checklist: what to inspect before you pay

Movement

• Quartz: thin, light, no sweeping seconds hand. Fine for low budgets, obvious to anyone who knows watches.
• Cloned automatic (often sold as a "clone" caliber): sweeps like the real thing, accuracy of about 10 to 20 seconds a day.
• Swiss ETA or Sellita: the same movements used in mid-range Swiss watches, serviceable by a local watchmaker.

Ask which movement sits inside and whether the seller can show a photo with the caseback removed. A seller who dodges that question is a seller to skip.

Case, bezel, and claws

The Constellation carries flat claws on the bezel on many versions, and those claws are hard to copy. On a good replica they sit flush and stay aligned with the case. On a poor one they look glued on, with visible gaps and rough edges.

Dial, hands, and date window

Check the applied logo, the text weight, and the date window position. Cheap replicas use printed logos that sit flat, thick fonts, and a date cut that does not line up with the crown.

Bracelet and clasp

Feel for sharp edges on the links and check the clasp engraving. A good bracelet flexes like a real one. A cheap one rattles and pinches.

Caseback and engraving

The caseback should carry the correct reference, the Constellation observatory medallion where the model calls for it, and crisp text. Fuzzy or misspelled engraving is the fastest tell.

What do replica Omega Constellation 131 watches cost?

• Under $100: quartz, plated steel, printed dial. Looks fine in a photo and cheap on the wrist.
• $200 to $350: automatic clone movement, solid steel case, decent bracelet. The sweet spot for most buyers.
• $450 and up: Swiss movement, better finishing, sapphire crystal with the correct shape, closer dial print.

Prices move with the market and with the specific reference, so treat these bands as a starting point. A price far below the band for a "Swiss" replica often means the movement is not Swiss.

Red flags that show up on cheap fakes

• Stock photos instead of pictures of the actual watch.
• No movement details, or vague claims like "high grade" with nothing behind them.
• Weight far below the genuine watch. Steel has a heft you can feel.
• Water resistance claims with no gasket details. Most replicas handle rain and hand washing, not swimming.
• Sellers who refuse a payment method with buyer protection.

FAQ

Is a replica Constellation 131 waterproof?

Most replicas hold up to splashes and hand washing. Diving or swimming is a risk unless the case has proper gaskets and the seller states a tested rating, which few do.

Can a watchmaker spot a fake Constellation?

Yes, and a good one will do it in a minute. Movements, engraving depth, crown threads, and bracelet end links all give it away. Replicas fool people at a distance, not a trained eye with tools.

How accurate is a replica automatic movement?

Clone automatics keep time within about 10 to 20 seconds a day. Swiss ETA and Sellita movements in the top tier sit closer to 5 to 10 seconds.

Is it legal to buy a replica Omega in the US?

Selling and importing counterfeit watches is illegal in the United States, and customs can seize shipments. Buying a counterfeit for personal use carries less risk, but the goods can still be taken at the border.

Bottom line

The name "fake Omega Constellation 131" covers a wide range of watches, from throwaway quartz copies to builds that copy the genuine case and run a Swiss movement. Decide which tier fits your budget, ask about the movement, and check the caseback, the claws, and the bracelet before you send money.