Answer first: a fake Breguet Classique Ultra Thin is a replica of a gold dress watch that measures about 5.4mm thick and sells for around $20,000. The better replicas copy the Roman numerals, the Breguet hands and the guilloche pattern well enough for a photo. Almost none copy the thinness or the movement. If the case back sits 3mm deeper on your wrist than the real thing, it is a replica, whatever the listing claims.
fake breguet classique ultra thin watch review
The watch the replica is copying
The reference most people mean is the Classique Extra-Thin 5157: 38mm across, roughly 5.4mm tall, 18k gold, with Breguet caliber 502.3 inside. That movement is about 2.4mm thick and uses a micro-rotor, which is why the watch can stay so flat. Breguet has built the whole identity of this line around that profile. A 38mm case that thin looks almost like a coin on the wrist, and the dial fills it edge to edge.
Fake Breguet Classique Ultra Thin Watch for Sale: A Buyer's Guide
Thinness is the first tell
Case makers can mill a top surface that looks slim. What they cannot do cheaply is fit a movement into 5mm of total height. Most replicas run a Miyota 9015 at 3.9mm or a cloned Chinese automatic at 4mm and up, and the mid-case has to grow to hold it. The result lands around 8mm to 9mm. Ask for a caliper photo, or a side shot with a ruler or a coin in frame. If the seller sends only face-on photos, that is the answer.
fake breguet classique ultra thin watch review
Dial details that separate good from bad
- Guilloche: the real dial is engine-turned, so the pattern is cut into the metal and catches light in steps. Replicas stamp or print it, and the lines look shallow and too even under a loupe.
- Breguet hands: the pomme hands have a hollow center and an eccentric moon tip. Fakes get the outline close, then polish it flat. The moon tip usually looks punched.
- Secret signature: Breguet has signed part of the dial faintly since the 1790s. On replicas it is either missing or too bold to be secret.
- Printing: check the BREGUET name and the numerals for ink bleed. Crisp edges, no fuzzy borders, and a serial number near 6 o'clock that was cut by hand rather than lasered.
Case, crown and case back
Genuine: sapphire cabochon in the crown, Au750 hallmark, hand-engraved reference and serial on the back, and a movement with Geneva stripes and circular graining on the bridges. Replica crowns use glass or dyed synthetic, hallmarks are pressed light or use the wrong font, and the back engraving is laser-etched, so it reads shallow and mechanical. The rotor is often a decorated plate screwed over a plain movement. Bring a loupe and look at the balance wheel and the jewel settings. Real Breguet finishing has sharp inward angles; replicas have rounded corners everywhere.
fake breguet classique ultra thin watch comparison
What you pay
High-end replicas of this model run about $300 to $800. Genuine 5157 pieces trade around $18,000 to $25,000 depending on metal and condition. A seller asking $1,200 for a "Swiss made 1:1" version is moving the same factory watch with a better story. There is no warranty, Breguet will not service it, and a watchmaker who will touch a replica is hard to find. Resale value is close to zero.
The legal side in the US
Trafficking in counterfeit goods is a federal offense under 18 U.S.C. 2320, and Customs and Border Protection seizes counterfeit watches at the border. Buying one for yourself carries less exposure than selling, but the parcel can still be stopped and you lose the money. CBP can also pass your details to the trademark owner.
Quick checklist
- Get the thickness in millimeters, with a caliper photo. Anything over 6mm is not an extra-thin.
- Tilt the dial under a lamp: cut guilloche shifts in steps, printed guilloche stays flat.
- Zoom the case back. Look at engraving depth and whether the movement has real anglage.
- Confirm the crown stone is a cabochon, not a glued dome.
- Check the metal and hallmarks between the lugs. An 18k case of this size feels dense and warm; plated brass feels light.