The short answer
If someone offers you a fake Breguet tourbillon perpetual calendar, the tourbillon may well be real and the perpetual calendar almost certainly is not. Chinese movement makers have been building true one-minute tourbillon cages for years, and those calibers turn up inside replica cases at prices that start around $400. A genuine mechanical perpetual calendar is a different problem. It has to track 28, 29, 30 and 31 day months plus the leap year cycle without correction until 2100, and that gear train is costly to design and costly to finish. Replica makers skip it.
So here is the honest read: you are buying a watch with a rotating cage and a calendar that lies. Most leap year subdials on these watches are scenery, and the month hand usually needs a nudge five or six times a year.
What the genuine Breguet does
Breguet's Classique tourbillon perpetual calendars are hand-wound grand complications. The tourbillon sits at 6 o'clock under a bridge, the dial carries day, date, month, leap year and moon phase, and the movement is finished to a standard that shows under a loupe: anglage, black polish, Geneva stripes, engraved plates. Breguet patented the tourbillon in 1801, and the house still builds the complication in-house.
Prices run into six figures. That matters because it sets the bar for everything a replica is imitating. Nothing at four figures comes close on finishing, and nothing at any replica price matches the calendar math.
What the replicas actually contain
- Tourbillon: often genuine. Seagull ST80-series calibers and similar Hangzhou and Liaoning tourbillon movements are the usual donors. They keep time and the cage rotates once a minute.
- Calendar: usually an annual or simple calendar module, or a day-date wheel dressed up with extra printed subdials. It does not know about leap years.
- Leap year indicator: commonly frozen, jumpy, or non-functional. Watch it for a month. If it never advances, it is decoration.
- Finishing: stamped or laser-cut bridges, painted blue hands instead of heat-blued steel, printed guilloche instead of hand-turned.
Price bands
- $80 to $250: quartz or low-grade automatic, fake tourbillon (an open aperture with a spinning disc), printed dial, mineral glass.
- $400 to $900: real Chinese tourbillon movement, decent case, calendar that is not perpetual.
- $1,200 to $4,000: custom builds with better cases and dials, sometimes a genuine tourbillon plus a modified module. Still not a perpetual calendar.
The tells I check first
Start with the leap year subdial. Set the watch to February 28 in a leap year and advance it. A real perpetual calendar rolls to the 29th and then to March 1 on its own. A replica stops at 28 or jumps straight to March.
Then look at the case. Breguet's coin-edge flanks are cut, not stamped, and the fluting stays even all the way around. On replicas the knurling tends to fade near the lugs.
Hands next. Real Breguet blued steel has a deep, slightly uneven sheen from heat treatment. Painted blue looks flat and uniform. Under a loupe the gap is obvious.
Finally, the dial. Hand-turned guilloche has fine concentric rings that catch light differently as you tilt the watch. Printed or stamped texture looks identical from every angle.
Questions to ask a seller
- Which movement is in it, and who made it?
- Does the leap year indicator advance on its own?
- What happens on February 28 in a leap year?
- Is the crystal sapphire or mineral?
- Will you take it back if the calendar does not track?
A seller who cannot answer the first two is selling you a watch with a spinning cage and a decorative dial.
Legal and practical reality
In the United States, counterfeit watches are seizable goods. US Customs and Border Protection can and does confiscate shipments, and trafficking in counterfeit goods is a federal offense. Beyond the law, there is no resale market, no service from Breguet, and no parts support. Independent watchmakers often refuse to touch a fake, and the ones who will accept the work charge accordingly.
If what you want is a tourbillon you can wear, buy a legitimate microbrand running a Chinese tourbillon movement. You get the real complication, a warranty, and no risk of a customs letter. If what you want is the Breguet look, understand that the calendar on the replica is theater and price it that way.