The pick for most people searching this reference is a high-tier replica of the Blancpain Villeret complete calendar, not the cheapest copy on the market and not a look-alike homage. I compared the options on five criteria: dial aperture alignment, moonphase disc rendering, case and lug geometry, movement finishing behind the display back, and how the watch behaves as a daily wearer. The genuine 6654-1127 is the reference point for every one of those checks.

What the 6654-1127 is, and why it resists copying

The reference is a steel Villeret with a complete calendar. The layout is the hard part: day and month apertures sit side by side in the upper dial, a slim serpentine date hand with a red tip reads off a numbered track around the edge, and a moonphase window sits at six o'clock. Nothing on the dial is a simple subdial, so a copy has to get aperture spacing, hand height, and printing weight right at the same time. The case is slim with a stepped bezel and short, curved lugs, which is where cheap copies usually give themselves away.

The checks that separate tiers

  1. Aperture alignment. The day and month windows should sit level, with even gaps and crisp cut edges. Crooked windows are the fastest tell.
  2. Moonphase disc. A real complication advances about once a day on a 29.5-day cycle. Many low-tier copies use a day and night disc that flips twice a day.
  3. Date hand. The serpentine hand should be thin, blued or red-tipped, and sit clear of the dial. Thick stamped hands scrape and look flat.
  4. Case profile. Measure thickness and check the lug curve against your wrist. Extra millimeter of height changes the whole silhouette.
  5. Caseback and rotor. Engraving should be cut, not laser-etched gray. Rotor decoration should follow a single consistent pattern.

Genuine Blancpain Villeret 6654-1127

  • Pros: Correct proportions throughout, an in-house calibre with roughly three days of power reserve, hand-finished bridges and rotor, manufacturer service, and a dial that photographs the way the design intends.
  • Cons: The cost is many multiples of any replica, servicing adds real money over time, and a complete calendar needs resetting at the end of short months.

Buy it if you want the watch as an object, not an impression. It rewards close looking, which is exactly the audience a replica cannot satisfy.

High-tier replica

  • Pros: Correct aperture layout and a functioning 29.5-day moonphase on the better examples, sapphire crystal with coating, a case that matches the original thickness closely, and decent strap options out of the box.
  • Cons: The date hand may jump late or drag, water resistance is unverified no matter what a listing says, servicing is difficult because parts are not standardized, and resale value is close to zero.

This is the option for someone who likes the Villeret design and wants it on the wrist at arm's length, with the understanding that it is jewelry, not an heirloom. Ask the seller for a short video of the moonphase advancing before you commit.

Mid-tier and budget copies

  • Pros: Low cost, useful for testing whether a 40 mm complete calendar suits your wrist before you spend on anything better.
  • Cons: Printed moonphase or a day and night disc, misaligned apertures, a case that runs thick, plated finishes that wear at the lugs, and straps that stiffen within weeks.

Use one as a size trial and nothing more. Wearing it as a daily watch tends to produce regret faster than enjoyment.

Homage or alternative complete calendar

  • Pros: A real moonphase and calendar from an established maker, a warranty, a service network, and no need to explain the watch to anyone.
  • Cons: Different design language entirely. No stepped bezel, no serpentine date hand, so the Villeret character is absent.

Pick this route if the complication matters more than the specific Blancpain look. It is the only option here that holds up to a watchmaker's loupe and to a decade of ownership.

Sixty-second inspection routine

  1. Set the time past midnight and watch whether the day and month snap together or drift.
  2. Look at the moonphase window from an angle. A stamped disc shows flat gray, a printed photographic moon shows soft gradients.
  3. Check the four recessed correctors on the case side and confirm each one moves a different function.
  4. Turn the watch over and compare the engraving depth with the rotor finishing.
  5. Flex the strap at the lugs. Stiff, shiny leather is a reliable sign of a budget build.

Bottom line

A high-tier fake Villeret 6654-1127 gives you the dial layout and the moonlight window without pretending to be a collectible. The genuine watch remains the only version worth servicing and passing on. Budget copies are size tests. If the calendar and moonphase are what actually drew you to the reference, a legitimate complete calendar from another maker will satisfy that interest longer than any replica will.