Answer first

A fake Villeret Eight Days is worth owning only when the movement delivers a genuine long reserve. The reference it copies carries a hand wound caliber with three mainspring barrels and a 192 hour reserve, and the dial carries a power reserve scale that actually tracks that reserve. Most replicas of this model do not. They pair a common 38 to 42 hour caliber with a printed line of text, or with a decorative needle that never leaves the top of its arc. Settle that question with the seller before you look at anything else, because no amount of dial finishing makes up for a watch that dies overnight on the dresser.

What to check before ordering

  • Movement identity. Ask for the caliber name and a clear photo of the movement with the caseback off. A decorated rotor over a basic automatic is fine if the seller names it. A seller who claims a true eight day reserve and cannot name the caliber is guessing.
  • Beat rate. 28,800 vibrations per hour reads smoother than 21,600. Both appear in this market, and the higher figure is not proof of quality on its own.
  • Power reserve behavior. Ask for a short video that starts with the watch fully wound and ends after the reserve scale drops. A working indicator moves in steps or a smooth arc. A fake one sits still.
  • Case architecture. The reference uses a stepped case with a slim bezel and short curved lugs. A copy with a flat slab case and long straight lugs will wear larger and flatter on the wrist.
  • Dial finish. Look for a fine grain or opaline surface, applied markers with polished edges, and printed text that matches the reference typeface. Flat matte dials with painted numerals are the usual shortcut.
  • Crystal and hands. Sapphire with an anti reflective coating on both faces, and hands that are blued or polished rather than painted.

Parameter bands

  • Case diameter: about 38 mm to 42 mm. The reference sits near 42 mm, so a 38 mm copy wears small.
  • Thickness: 11 mm to 14 mm. Thin cases usually mean a thinner movement and a shorter reserve.
  • Lug width: 20 mm to 22 mm, which decides how easy straps are to source later.
  • Reserve measured on a full wind: 36 to 48 hours for standard calibers, 70 to 120 hours for twin barrel builds. A true 192 hour result is rare in this market.
  • Water resistance: treat any claim of 30 m or 50 m as splash protection only.

Pitfalls that cost money

  • Photos of a genuine watch used as listing images. Ask for timestamped photos of the actual unit you will receive.
  • Plated cases that wear through at the lugs and crown within a year.
  • Cross threaded casebacks and stripped crown threads, both common on thin cases.
  • No stated return window and no service option for a movement that arrives running fast.
  • A quote that climbs after you ask for a movement photo, which usually means the first figure was for a lower grade watch.

FAQ

Does a replica Villeret Eight Days really run for eight days?

Rarely. Expect 36 to 48 hours on most units and up to about five days on the best twin barrel builds. Test it on arrival: wind it fully, note the time, let it rest face up, and check when it stops.

Is the power reserve indicator functional?

On many copies it is not. The needle is fixed or moves through a narrow arc. Ask for video proof before payment.

How do I check the movement without opening the case?

You cannot, so buy from a seller who will send movement photos or a short clip with the caseback removed. Winding feel also tells you something. A gritty or springy crown on a hand wound caliber points to a cheap click spring.

What size should I pick?

Match the reference at about 42 mm if you want the intended look. Smaller copies suit narrow wrists but lose the proportions of the stepped case.