The Short Answer

A fake Breguet tourbillon perpetual calendar is almost never a perpetual calendar, and often not a true tourbillon either. Under about $300 you get a decorative cage or open-heart cutout standing in for the tourbillon, plus a triple-date or annual-calendar module. Between $500 and $900 you start seeing genuine one-minute tourbillon movements from Chinese makers, but the calendar drops to a plain date or a full calendar that needs manual correction every February and every 30-day month. Real 400-year perpetual mechanics show up in replica form only in a handful of custom builds, and they command four figures.

What Breguet Actually Builds

Abraham-Louis Breguet patented the tourbillon in 1801, so the name carries weight in this exact category. The current lineup splits the two complications rather than merging them everywhere: the Classique 5327 is a perpetual calendar without a tourbillon, the Classique Grande Complication 5347 uses a double rotating regulator, and the Marine 5887 is the piece most reps imitate, since it pairs a tourbillon with a perpetual calendar and an equation of time. Most replica listings copy the 5887 dial layout or borrow the 5327 calendar subdials and drop a tourbillon aperture at 6 o'clock.

Why the Combo Is So Hard to Copy

A perpetual calendar is a mechanical program, not a display. The date wheel advances once per day, a 48-month cam reads the month, and a leap-year cam decides whether February ends at 28 or 29. Get the tooth count or the cam profile slightly wrong and the watch drifts a day every four years. Stacking that on top of a tourbillon carriage adds friction and eats power reserve. Copying a dial is easy. Copying that gear train at a $400 price point is not, which is why almost nobody does it.

What Each Price Tier Delivers

  • Under $150: quartz or basic automatic, painted or printed calendar subdials, an open balance wheel dressed up as a tourbillon. Nothing functions except the time.
  • $200 to $400: A7750 or A7751 base movement with working day, date, month and a 24-hour subdial standing in for a moonphase or leap-year indicator. The tourbillon is usually still fake.
  • $500 to $900: a real Seagull or Hangzhou tourbillon, cage rotating once per minute, visible through a sapphire aperture. Calendar is typically just a date, sometimes a month window.
  • $1,000 and up: custom tourbillon plus a calendar module with a leap-year hand. Check whether that hand actually computes anything or just ticks with the month.

What to Check Before You Buy

Case diameter first, since reps love to oversize. The 5887 sits around 43mm; anything at 46mm with the same dial print is a fantasy build. Look at the guilloché pattern: hand-turned barleycorn has depth and slight irregularity, stamped dials look flat and repeat identically across the surface. Breguet hands should be the pomme style with an eccentric moon tip, not generic leaf hands. Flip it over and read the engraving on the caseback and the movement plate, since sloppy lettering is the fastest tell. Then ask the seller two direct questions: does the month advance on its own, and does the moonphase disc run a 29.5-day cycle or a flat 29? Vague answers mean a decorative module.

Living With One

Never set the calendar between roughly 9 p.m. and 3 a.m., because the date mechanism is already engaged and you can shear teeth. Use the recessed pushers, not the crown, for month and moonphase. A replica tourbillon wants service more often than a standard automatic, so budget for it if you wear the watch daily. And expect to reset the calendar by hand on March 1, because that perpetual badge is usually just a badge.

One last note: replica watches are replica watches, and laws on selling and importing them differ by country. Describe them honestly as replicas and you avoid most of the trouble.