The short answer
"Fake carrousel 6648" is a search phrase, not a watch. No single model sits behind it. In listing language, carrousel is a borrowed word for a rotating carriage inside the movement, the same trick a tourbillon uses, and 6648 is a number sellers attach to whatever case they have on the bench that month. Two listings with that number can show two completely different watches. That inconsistency is the first thing to notice, because a real reference number does the opposite: it narrows a model down.
What "carrousel" is doing in the title
A carrousel (also spelled karussel) is a real piece of watchmaking. Instead of mounting the balance and escapement on a fixed bridge, the watch puts them in a carriage that turns, so gravity affects the rate the same way no matter which way the wrist is pointing. A tourbillon does this too, and the two get confused often. On a genuine example you can see the balance wheel riding inside the rotating cage. On a cheap copy, the opening is decorative: a cutout in the dial, a spinning rotor behind it, or a balance that sits still while something else turns nearby.
When a seller writes "carrousel" in a title, treat it as a style claim, not a spec. It tells you the dial has an opening and something moves inside. Nothing more.
Where the 6648 comes from
I have not found 6648 in Rolex's published reference lists as a well-documented model. Even if a number close to it sits somewhere in the brand's archive, sellers recycle digits constantly, and the same string turns up across date-style, day-date-style, and two-tone cases. So the number is not an identifier. It is decoration that makes a listing look specific.
How to read a listing without getting fooled
- Ask for the movement by name. "Automatic" is not an answer. A real tourbillon or carrousel movement has a caliber number, and the seller either knows it or does not.
- Ask for a video, not photos. Photos hide motion. A ten-second clip from an angle shows whether the cage turns or the dial just has a hole in it.
- Count what rotates. In a tourbillon the carriage typically finishes a turn each minute. A karussel runs on a different cycle. If nothing you can see moves on a steady beat, the feature is cosmetic.
- Check the case back. A display back should show the carriage from behind. A solid back on a "carrousel" model usually means there is nothing worth showing.
- Compare two listings with the same number. If the case size, specs, and photos disagree, the number means nothing.
What the price tells you
A working rotating carriage is hard to make and hard to service. When a watch with that word in the title sells for the price of a nice dinner, you are paying for a dial, not a complication. That is not automatically a bad buy if you know what you are getting. It becomes a problem when the listing implies mechanics that are not there.
Shipping, customs, and the legal side
Counterfeit goods are illegal to import into the United States. CBP can seize a shipment, and you have no recourse when that happens. Payment methods that leave no paper trail also leave you with no way to dispute a charge. I would weigh that before sending money overseas for anything marketed this way. If what you actually want is the look, a legitimate homage watch with a documented movement gets you there with a warranty and a package that clears customs.
Bottom line
There is no fake carrousel 6648 to research. There is a phrase sellers use to describe a dial with an opening, plus a number that changes meaning from one listing to the next. Judge the watch in front of you, ask for the movement caliber, watch it run on video, and ignore the words in the title.