Quick answer
There is no official Omega model called the "57th anniversary Moonwatch." The Speedmaster line dates to 1957, so the number turns up in listings, but Omega's own anniversary pieces carry other names, such as the 60th anniversary Trilogy set in 2017 and the 65th anniversary Speedmasters in 2022. When a listing leans on "57th anniversary," it is selling a replica, and often a copy of the Speedmaster '57 re-edition rather than the Moonwatch Professional. Pull the reference number before you do anything else. The phrase by itself identifies no watch.
What these watches usually are
Most of what shows up under this label is a 39 to 42 mm stainless case with a printed dial and a fake moonphase or date function that never existed on the original. The movement is the real tell. Inside you tend to find a hand-wound Seagull ST19 chronograph, a Chinese take on the Valjoux 7750, or a quartz module in the cheap ones. None of them are a Co-Axial Master Chronometer caliber 3861, whatever the listing claims. Co-axial escapements, silicon hairsprings, and chronometer certification at that level are not things a $200 case-and-dial operation reproduces.
The legal side in the US
Trafficking in counterfeit goods is a federal crime under 18 U.S.C. 2320, and penalties reach 10 years in prison and a $2 million fine for a first offense by an individual. Buying one for yourself does not make the import legal. U.S. Customs and Border Protection seizes counterfeit watches, and the parcel disappears along with your money. Paying by wire or crypto leaves no chargeback path, and sellers who advertise openly tend to rotate domains for that reason. If you later resell the watch as genuine, that is a separate fraud exposure.
What you give up besides the legal risk
- Warranty and service: no Omega service center will touch it, and most independent watchmakers will not source parts for a counterfeit case.
- Water resistance: a rating printed on a caseback is not a tested seal. Swimming with one is a gamble.
- Finishing: sharp lug edges, soft polishing, and lume that fades in an hour instead of glowing all night.
- Resale: zero. Nobody legitimate will buy it, and pawn shops avoid the liability.
If you actually want the look
Legitimate homages exist from brands that do not stamp Omega's name on the dial, and a few of them use decent Swiss or Japanese movements. If it has to be the real thing, a used Moonwatch Professional in hesalite is the better long game. It has a documented service history, it holds value, and it can be sold later. A counterfeit is money that leaves and never comes back.
Bottom line
Treat "57th anniversary" as a keyword, not a model. Look up the reference, ask who made the movement, and assume the overseas seller has no obligation to you once payment clears. The honest answer to this search is that the watch you are picturing was never made under that name.