Quick answer
A replica Breguet Classique moon phase gets you the silhouette of a $25,000 to $40,000 dress watch for a few hundred dollars. What it does not get you is the hand-cut guilloché, the movement finishing, or a moon disc built to the same tolerance. On most copies under $400 the moon window is really a 24-hour day/night wheel with a moon printed on it, so it rolls around once a day instead of once every 29.5 days. If that detail matters to you, step up a tier. If you only want the look on the wrist, the entry tier does the job.
Why this reference gets copied so hard
The Classique line is the reference point for the whole dress watch category. Thin bezel, straight lugs, fluted caseband, blued hands, engine-turned dial. It reads as expensive from across a room. There is also no chronograph to fake, no pushers, no screw-down crown, no dive bezel to align. Fewer parts means fewer things a factory can get wrong, which is exactly why the moon phase version became a staple of the replica catalogs.
The moon phase is the real test
A proper moon phase runs on a 59-tooth gear. That gives 29.5 days per cycle, and the true synodic month is 29.53, so even a genuine watch drifts about one day every two and a half years. Good factories copy that gearing. Cheap ones print a moon on the date or day/night wheel and call it done.
Here is the check I use. Set the moon to full, then advance the date 15 days. On a correct replica the disc lands halfway around, a half moon facing the other way. On a dressed-up day/night wheel it barely shifts at all, or it jumps a full turn. Ask for a video of the date change, not a still photo. Photos hide everything.
Dial work
On the genuine watch the guilloché is cut into the metal with a rose engine. On replicas it is stamped and then plated, so the pattern sits shallow and the lines look flat under a loupe. At arm's length most people will never notice. Under a hard light source the stamped dial throws a duller, flatter reflection than the real thing.
Watch the printing too. On lower-tier dials the word Breguet runs a little fat and the spacing between the lines sits tight. Some factories skip the secret signature entirely, others print it so dark that it stops being secret. If a seller cannot send you a close macro of the dial text, that tells you something on its own.
Case, lugs, and thickness
The fluted caseband is the giveaway nobody talks about. Real ones have crisp, evenly spaced grooves running around the middle case. Reps soften those grooves or skip them on the back half where the light does not hit.
Thickness is the second tell. Genuine Classique moon phase models sit around 10mm. Most replicas run 11 to 12mm because of the movement underneath, and the caseback sits proud of the wrist. Set one next to a real one on a table and the extra height is obvious before you even look at the dial.
Movement and the caseback view
Most of these run on a modified Asian automatic, often a 7750-style base with the chronograph parts removed so the moon and power reserve can be driven off it. That is why the case gets thicker and why the rotor can be noisy when you move your wrist.
Flip it over and look for three things: perlage that looks like clean overlapping circles rather than a blurry haze, screws that are actually heat-blued rather than painted, and rotor engraving with the letters spelled correctly and spaced evenly.
Price tiers, roughly
- Under $150: day/night wheel instead of a moon phase, plated case that wears through in months, mineral glass.
- $200 to $400: stamped guilloché, sapphire on the good ones, and a real 29.5-day moon disc on maybe half of them.
- $400 to $700: cleaner dial print, closer to correct thickness, sharper caseband grooves, sapphire front and back.
Before you pay
- Ask for a video of the moon moving as the date changes.
- Ask for the measured thickness in millimeters and compare it to the real spec.
- Ask what the case metal is. Plated brass and plated steel age very differently.
- Check the return policy. Movement faults show up in the first two weeks or not at all.
The honest part
It is not a Breguet. It will not hold value, no watchmaker will service it cheaply, and it should never be sold or shown as the real thing. Buy it as a costume piece that happens to keep decent time, and you will be happy with it. Buy it hoping it turns into an investment, and you will not be.