Short answer first: Omega has never published a watch called the "Moonwatch 57th Anniversary." The Speedmaster name dates to 1957, and the "Moonwatch" nickname came from the 1969 Apollo 11 mission. Sellers who mash those two together are usually dressing up a generic Speedmaster-style replica with a name that sounds official and rare. There is no factory reference to compare against, so the seller ends up setting the standard. That is the most useful thing to know before you spend money.

What follows is how I sort through listings that use the tag, and what the watch in the photos is likely to be.

The "57th anniversary" label, explained

Anniversary editions in the watch world are numbered, documented, and tied to a specific year. A real one has a reference number, a press release, and official photos. When a listing says "57th anniversary" with no reference number and no documentation, that is a marketing phrase, not a model name. Expect a 42mm steel chronograph that copies the Moonwatch silhouette.

How to read the watch in the photos

• Case size. The Moonwatch is 42mm across, roughly 13mm thick, with 20mm lugs. Copies often come in at 40mm or run 22mm lugs because the case is a stock part.
• Subdial layout. Real: running seconds at 9, 30-minute totalizer at 3, 12-hour counter at 6, spaced tight toward the center. A 7750-based copy pushes the subdials outward and sometimes drops the 12-hour counter.
• Beat rate. The 1861 and 3861 movements run at 21,600 vph, so the chronograph seconds sweep in visible steps. A fake running at 28,800 vph sweeps smoother. Seagull ST19-based copies do run at 21,600, which is one reason they are the better of the cheap options.
• Bezel. The current 3861 Moonwatch uses the "dot over 90" bezel. Older 1861 models use the dot beside the 90. Listings that mix a dot-over-90 bezel with old-style dial text describe two different watches.
• Caseback. Real engraving includes the seahorse medallion and the NASA flight-qualification line. Blurry laser etching, wrong spacing, or a smooth back are all tells.
• Crystal and dial. Hesalite domes and shows some warmth; sapphire is flatter and clearer. Cheap copies often use coated mineral glass that scratches fast and shows a purple cast.

Movement, service, and what you live with

Any replica chronograph is a mechanical watch with moving parts, and that means it needs service eventually. Independent watchmakers will work on an ST19 or a 7750. Problems start when a seller ships a no-name movement with no parts supply, because then a routine service becomes impossible and the watch is disposable. Ask which movement is inside, and ask for a photo with the caseback off. A seller who cannot answer that is guessing.

The legal side, honestly

In the United States, trafficking in counterfeit goods is illegal under the Lanham Act, and U.S. Customs and Border Protection can seize counterfeit watches even when they are imported for personal use. That is not a scare tactic, it is how the rules work. Resale value is effectively zero, and no authorized dealer or service center will touch one. If those tradeoffs matter to you, a genuine Speedmaster on the secondary market or a Seiko or Citizen chronograph does the same job legally.

If you go ahead anyway, treat the listing as what it is: a lookalike sold on appearance. Judge it on the movement, photos of the actual piece, and the return policy, not on an anniversary name no manufacturer ever used.