Short answer

A fake complication on a Breguet replica is any feature that looks functional but is not. The subdial turns, the disc spins, the hand sweeps, and none of it tracks anything real. The dial says tourbillon, perpetual calendar, or minute repeater, while the mechanism underneath is decoration bolted to a basic movement. Plenty of replica Breguet watches at the bottom of the market are full of these. The better ones are not, and the difference usually shows up within thirty seconds of handling.

Breguet's real complication list

It helps to know what is being copied. Breguet's catalog leans on the tourbillon above all else, since Abraham-Louis Breguet patented the device in 1801 and the house has never let anyone forget it. Beyond that you get perpetual calendar, equation of time, minute repeater, retrograde date and seconds, moon phase, GMT, power reserve, and chronograph. Each is a mechanical function with a defined job. A replica earns the label only if the function performs that job.

The three tiers of replica complications

In practice, what shows up on replica Breguet dials falls into three groups.

  • Working. The mechanism does what the dial claims. A real tourbillon carriage with a balance and escapement inside. A chronograph that starts, stops, and resets. A date that flips at midnight on the correct day.
  • Cosmetic. Something moves, but it is not the thing advertised. A rotating carriage with no escapement. A power reserve hand that never drops. A moon phase disc that cycles once per day instead of once per 29.5 days.
  • Painted on. Flat printed subdials, hands that do not move, pushers screwed into a solid case. Common on quartz versions, where a chronograph dial is often just a printed pattern with a running seconds hand.

How to test any complication in a minute

  1. Chronograph: start it, watch the central hand for a full minute, then reset. If the hand ticks in one-second steps, it is quartz with a decorative dial.
  2. Power reserve: wind the watch fully, let it sit for twelve hours, then look again. A real indicator drops. A fake one stays put, or moves on a fixed daily cycle no matter how much you wind.
  3. Moon phase: check whether the disc advances every 24 hours or roughly every 29 to 30 days. Watch it for two days and the difference is obvious.
  4. Tourbillon: look inside the cage. You want a balance wheel and hairspring with a pallet fork. A cage with nothing in it, or a balance sitting outside a rotating bridge, is theater.
  5. GMT: pull the crown to the setting position and try to move the 24-hour hand on its own. If it only travels with the main hands, the GMT is decorative.
  6. Retrograde: watch a full cycle. A real retrograde snaps back at the end of its arc. A printed arc with a hand that stalls is not retrograde.

What replicas get right

Tourbillons are the surprise. Chinese-made tourbillon movements have been available at low prices for years, so a working flying tourbillon on a Breguet Classique or Tradition copy is realistic rather than a contradiction. Chronographs are also often genuine, using cam-actuated or column-wheel movements. Date and day complications are almost always functional because building them correctly is cheap. If a replica lists three complications and one is a tourbillon, the tourbillon is the one I would expect to be real.

What replicas almost never get right

  • Minute repeaters. A real repeater needs hundreds of parts and a trained ear to regulate. The slide on a replica typically does nothing at all. If the listing mentions a chime, assume silence until you hear a recording.
  • True perpetual calendars. Working perpetual mechanisms do exist in replicas, but they are rare and fussy. Most are complete calendars with the leap year indicator printed on the dial instead of driven by the movement.
  • Equation of time. Nearly always a decorative hand on a separate train, or a hand that simply does not move.
  • Independent GMT. The 24-hour hand on most replicas is geared to the main hands and cannot be set separately.

What to ask before buying

Ask for video of the complication running, not a photo. Ask which movement is inside, by name or caliber. Ask what happens at midnight and whether the date changes instantly or creeps over an hour. A seller who knows the product answers all three in one message. A seller who does not will send a stock image and a price.

I look for two things in any listing: a named movement and a demonstration with a moving seconds hand. If either is missing, treat every complication on that dial as decoration until proven otherwise.

Price as a sanity check

Complications cost money to build. A working tourbillon, a functioning chronograph, a true moon phase: each one adds real parts and real assembly time. Very cheap replicas advertising four complications are almost always cosmetic on all four. The listings worth taking seriously tend to sit in the middle of the market and name the movement they use.