Short answer
A fake Villeret Eight Days is a replica of a Blancpain Villeret 8 Days. The genuine watch is manual wind, uses two barrels, and runs 192 hours on one full wind. "Eight days" describes the power reserve. It has nothing to do with a calendar or a date window. Most replicas copy the dial, the hands, and the case shape, then fit a 38 to 42 hour automatic movement from a third-party supplier. The reserve display on those replicas is often decorative.
What the genuine watch is
Blancpain traces its start to 1735 in Villeret, a village in the Swiss Jura. The modern Villeret line carries that name. The 8 Days references use a manual-wind caliber with two series-coupled barrels. Blancpain lists the reserve at 192 hours. That is eight days of run time from one wind. A watch with this reserve can sit in a drawer for a week and still keep time when you pick it up.
Case sizes across Villeret 8 Days references run near 38 mm to 42 mm. Metals include steel, rose gold, and platinum, depending on the reference. Dial layouts change by reference. Several carry a power reserve display on the dial. Some carry small seconds. A few add a date.
Where replicas differ
- Reserve: 192 hours on the real watch against 38 to 42 hours on most replicas. Some listings claim 72 hours and deliver less.
- Movement: in-house manual caliber on the real watch against a cloned or generic automatic on the replica.
- Thickness: two barrels need space. Replica cases run thick or thin against the reference because the movement does not match.
- Reserve display: on many replicas the hand does not track the mainspring. It sits at a fixed point or moves with the rotor.
- Finishing: the real movement has Geneva stripes, polished bevels, and blued screws. Replica finishing is stamped or printed.
- Dial text: study the "8 JOURS" line under magnification. Replica print is heavier and less even.
Checks in hand
- Wind the watch until it stops and set it down. Check the time after 48 hours, then after 96. A replica will stop before 96.
- Watch the reserve hand during the wind. On a real 8 Days caliber the hand moves as the barrels fill.
- Turn the watch over. Two barrels take up space under the dial. Study the layout and the engraving depth.
- Measure the case with calipers. Compare against the published dimensions for that reference number, not against photos.
- Weigh the watch. Gold references run heavier than steel. A gold-plated replica does not.
Cost and legality
Blancpain Villeret 8 Days references trade on the secondary market in the five-figure USD range for most metals. Replica listings run near $100 to $700. Prices move, so check current listings for a specific reference.
In the US, importing counterfeit goods is illegal. U.S. Customs and Border Protection can seize shipments. Selling a replica as a genuine watch is trademark infringement and can be charged as fraud. A replica sold as a replica is a separate matter from a replica passed off as real.