The replica Blancpain 6654-3642-55B copies the Villeret Quantième Complet: a 40 mm stainless steel case, an opaline white dial, applied steel indices, and a complete calendar that shows day, date and month with a moon phase above 6 o'clock. A good copy runs a 28,800 vph automatic movement with a working calendar module, uses sapphire crystal, and measures roughly 10.7 mm thick on a 22 mm alligator-style strap. Expect $250 to $600 at that level; watches near $100 usually drop the true moon phase drive and switch to mineral glass.
What exactly is reference 6654-3642-55B?
Reference 6654-3642-55B is a Villeret Quantième Complet from Blancpain. The dial places day and month in twin apertures under 12 o'clock, a red-tipped serpentine date hand around the flange, and the moon phase at 6 o'clock. The original is powered by the in-house calibre 6654 with a power reserve of about 72 hours.
How does the calendar in a replica actually work?
The calendar is a module stacked on top of a base automatic movement. The date hand, day disc, month disc and moon phase disc each run off that module, which is where quality shows first.
- Correct moon phase: advances one tooth per day and finishes a full cycle in about 29.5 days.
- Fake moon phase: either jumps in a 31-day cycle or simply tracks the date hand.
- Quick-set: recessed correctors near 4, 8 and 10 o'clock adjust day, date and month without pulling the crown.
Which movement tiers exist?
Replica Blancpain complete calendars fall into three rough bands.
- Budget, $90 to $180: quartz or a low-beat automatic, printed moon phase, mineral glass, calendar discs that drift out of alignment.
- Mid, $250 to $450: 28,800 vph automatic with a functional module, sapphire crystal, clean date jump, 38 to 42 hours of reserve.
- Top, $500 to $800: decorated rotor, perlage and blued screws, crisp apertures, correct feuille hands, plus a 72-hour claim that often falls short in testing.
What should you inspect before buying?
Ask for photos of the exact watch, not catalog renders, then check the points below.
- Aperture alignment: day and month sit centered and flush under the 12 o'clock marker.
- Date hand shape: slim serpentine hand with a red tip, never a blunt needle.
- Case profile: 40 mm across, about 10.7 mm thick, stepped polished bezel, 22 mm lugs.
- Dial texture: opaline white with a soft sheen rather than flat paper white.
- Moon phase disc: visible dome under sapphire, with a crisp painted moon rather than a blurry decal.
- Weight: steel should land near 70 to 80 grams on the strap.
Is a replica Blancpain legal in the United States?
No. US Customs and Border Protection treats counterfeit trademarked goods as prohibited and can seize shipments at import. Buyers also face loss of funds and possible penalties, and trademark owners pursue sellers. Treat the purchase as carrying real risk.
How do you keep it running well?
Use the correctors, not the crown, to set the calendar so the module does not strip. Avoid changing the calendar between 9 p.m. and 3 a.m., when the discs are already engaged. A service every three to five years keeps the moon phase and date jump accurate.