The short answer
There is no Blancpain model called the "6654B." The number points to the Villeret complete calendar family, and the reference most people actually mean is the stainless steel 6654-1127-55B. Anything sold online as a "fake Blancpain 6654B" is a counterfeit: a mass-produced watch with Blancpain printing on the dial, usually priced somewhere between $200 and $600. The genuine watch is a 40mm automatic with a 72-hour power reserve, four calendar correctors recessed under the lugs, and a blued serpentine date hand. Those details are exactly where most fakes fall apart.
What the real 6654 is
The Villeret complete calendar moonphase is one of Blancpain's core dress watches. Blancpain lists the steel version at roughly 40mm across with about 30m of water resistance, and the dial carries a full calendar rather than a simple date.
- Day and month windows side by side at 12 o'clock
- Moonphase aperture at 6 o'clock
- Date shown by a hand running around an outer track, not a window
- Calibre 6654 automatic, 72 hours of power reserve, gold rotor and Geneva stripes
- Four correctors sunk into the caseback side of the lugs, one per lug
The tells I check first
Under-lug correctors
This is the fastest filter. Blancpain puts the calendar adjusters under the lugs, flush with the case. Fakes almost always cheat with pins or buttons on the case flank instead, because copying the recessed geometry is expensive. If you can see pushers sticking out of the side of the case, stop there.
The date hand
The genuine date hand is blued steel and serpentine, with a curved tip that reads like a snake's head. On replicas it is usually a straight, flat-painted hand with no taper, and the blue is a coating rather than a heat-blued finish.
The moonphase disc
On the real watch the moon is engraved and finished, with a face that has actual relief. Counterfeits use a stamped foil disc that looks flat under a loupe and often has a smeared or cartoonish moon.
Case thickness and crown
The Villeret case is slim for a complete calendar. Replicas built on a generic modular movement run noticeably thicker, and the crown is usually unsigned or has soft, shallow engraving.
The movement
Look at it through the display back. Genuine calibre 6654 is finished, signed, and runs a silicon balance spring on modern production. Replicas show an ETA or Seagull base with a decorative plate bolted on top, mismatched engraving, and no consistent finishing.
Price and paperwork
Used steel 6654 examples commonly ask in the range of $9,000 to $14,000, and boutique retail sits higher than that. If someone offers you a complete calendar Blancpain for a few hundred or even a couple thousand dollars, the price is the answer. Real ones also come with a warranty card, a matching serial on the caseback, and box documentation that ties to the reference.
If someone is offering you one
- Ask for the full reference number and the serial, then compare both against the caseback.
- Check the correctors. Under the lugs or not, that is your answer.
- Photograph the movement through the caseback and look for a signed, finished calibre.
- Get an independent watchmaker to open it before any money changes hands.
- Walk away from any deal that requires you to skip step four.
Why the name itself is a warning sign
Blancpain does not label a watch "6654B." Sellers who use that shorthand are usually working from a factory listing rather than a reference catalog, and the same listing often gets reused across several brands. Treat the name as the first clue, not a model designation.