The Short Answer

Most replica Breguet Classique Tourbillon 7787 watches run a hand-wound Chinese tourbillon, typically a Seagull ST80-series caliber or a Dandong-built equivalent. It is not a copy of the Breguet in-house hand-wound tourbillon and it shares no parts with one. The cage makes one full turn per minute and the balance usually beats at 21,600 vibrations per hour (3 Hz). The tourbillon is real and functional. The engraving, the perlage, the blued screws, and the hairspring quality are not close to the original.

breguet tourbillon 7787 replica review

What Is Actually Inside a 7787 Replica

A genuine 7787 carries a Swiss hand-wound tourbillon caliber finished in the Breguet workshop, with a one-minute tourbillon, a Breguet overcoil hairspring, and hand-engraved bridges. Replicas substitute an off-the-shelf Chinese tourbillon movement, then decorate the bridges to imitate Breguet architecture. Some sellers describe this as a "clone movement." It is a lookalike, not a clone.

Replica Breguet 7787 for Sale? What US Buyers Should Know First

Typical movement tiers

  • Under $400: a decorated plate over a quartz or plain automatic movement. The cage may spin while the escapement inside stays still.
  • $500 to $1,000: a real Chinese hand-wound tourbillon with basic finishing and a sapphire or mineral crystal.
  • $1,200 and up: the same movement family with better perlage, properly blued screws, sapphire front and back, and cleaner dial printing.

How to Confirm the Tourbillon Actually Works

  1. Flip the watch over and find the tourbillon cage through the caseback.
  2. Wind the crown 20 turns clockwise and let the watch run for a minute.
  3. Time one full cage rotation with a stopwatch. It should take 60 seconds.
  4. Look inside the cage for a moving balance wheel, escape wheel, and pallet fork.
  5. Compare the small seconds hand with the cage. If the hand ticks once per second while the cage turns, a quartz movement sits under a decorative bridge.
  6. Listen for a steady beat of roughly six ticks per second.

Winding, Setting, and Power Reserve

  1. Wind the crown clockwise only, and stop when you feel firm resistance.
  2. Expect 40 to 60 hours of running time from a full wind.
  3. Pull the crown to the setting position before you move the hands.
  4. Move the hands clockwise to the correct time.
  5. Push the crown back in and confirm the seconds hand restarts.

Do not force the hands backward on a Chinese tourbillon. The setting parts are thin and a backward turn can strip the intermediate wheel. If the watch has been sitting for weeks, wind it fully before you set the time.

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Finish Details That Give It Away

  • Engraving depth: laser marking sits flat on the surface, hand engraving shows cut walls and slight variation.
  • Blued screws: cheap examples are painted blue, and the slot edges show bare steel.
  • Perlage: circles under the bridges run uneven and overlap in patches.
  • Cage finish: polished arms with sharp edges catch light in a hard, flat way.
  • Caseback text: shallow stamps with fuzzy letterforms instead of crisp, deep stamps.

Accuracy and Servicing

A Chinese tourbillon replica typically runs within 10 to 20 seconds per day out of the box. Regulation helps, but the hairspring and balance are the weak points, so the rate drifts with position and temperature. Many local watchmakers decline to service these movements because parts are not in the supply chain. When a repair is possible, the labor often costs more than the watch. Buy from a seller who offers a warranty and a return window, and treat the movement as disposable rather than serviceable.

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Buying Checklist

  1. Ask for a close photo of the movement through the caseback.
  2. Ask for a video showing one full 60-second cage rotation.
  3. Confirm the movement is hand-wound and not automatic or quartz.
  4. Confirm the beat rate, which should be 21,600 vibrations per hour.
  5. Ask which movement family is used, Seagull or Dandong.
  6. Check the warranty length and the return policy in writing.

If the seller cannot answer these questions with photos and video, walk away. The movement is the whole point of a 7787 replica, and a decorated quartz plate is the most common failure in this market.