A fake Breguet Extra-Thin is a replica of Breguet's ultrathin Classique line, most often the 38 mm ref. 5157 and the 40 mm small-seconds ref. 7147. Genuine examples sit near 5.5 mm tall, while most replicas measure between 7.5 mm and 9.5 mm. That thickness gap is the fastest way to tell them apart in person.
What defines the Breguet Extra-Thin family?
Three features carry the design: an ultrathin automatic case, a hand-guilloché dial, and heat-blued Breguet hands with hollowed moons. The fluted caseband and screwed lug bars complete the profile. Replica makers copy the outline first because that outline is what reads across a table.
Why is this watch difficult to copy well?
Thinness is a movement problem, not a case problem. The genuine caliber 502.3 is a slim automatic, which is what allows the whole watch to stay near 5.5 mm. Replica factories usually drop in a mass-market automatic and then thicken the case to hide it.
Guilloché is the second barrier. Genuine dials are engine-turned on a rose engine, so the pattern catches light in fine, continuous lines. Replica dials are stamped or printed, and the texture looks flat under raking light.
How thick are replica Breguet Extra-Thin watches?
Most replicas land between 7.5 mm and 9.5 mm, while the best slim-built versions reach 6.8 mm to 7.5 mm. Measure at the center of the caseback, not across the crystal, because domed glass adds false height. A 2 mm difference sounds small until the watch hits a shirt cuff.
Which movements appear in slim replicas?
- Miyota 9015 automatics: reliable and easy to service, but roughly 3.9 mm thick before the case is added.
- Seagull and Hangzhou slim automatics: thinner case options with mixed finishing quality.
- Decorated clone-style automatics: engraved rotors and closer visuals, but harder to repair.
- Quartz: the thinnest option, and a poor match if the watch has a running small seconds hand.
What should you inspect before buying?
- Case thickness at the caseback center, measured with calipers.
- Dial texture under a phone light held at a low angle, looking for stamped flatness.
- Hands: genuine pieces are heat-blued steel, replicas are often painted and look purple-black.
- Caseband flutes: they should be crisp and evenly spaced, not shallow or soft.
- Lug bars: Breguet uses screwed bars with hexagonal heads, and replicas often fake the screw.
- Crown size, engraving, and how cleanly the hands set.
- Caseback markings: reference number, metal stamp, and serial depth.
Does a replica carry Breguet's secret signature?
The secret signature is an offset or engraved marking that appears only at certain angles. Printed replica dials rarely place it correctly. A signature that is obvious from every angle is a warning sign, not a bonus.
Frequently asked questions
Are fake Breguet Extra-Thin watches worth buying?
Value depends on the movement tier, the case finishing, and how close the profile sits to the real 5.5 mm. A slim automatic with a well-defined guilloché dial delivers more of the look than a thick case with an engraved rotor.
Is a quartz version a good choice?
Quartz keeps the case thin and the price low, but the ticking small seconds hand is an instant tell. Skip it if the model has a subdial at six.
What strap size do these replicas take?
Most 38 mm and 40 mm versions use a 19 mm or 20 mm lug gap. Measure the gap before ordering a replacement strap, since replica specs vary between batches.
Can a replica Breguet Extra-Thin get wet?
Treat it as splash resistant at best. Ultrathin cases have thin gaskets and shallow caseback threads, so swimming and showering put the movement at risk.
Care notes for a thin case
Ultrathin movements tolerate shock poorly, so avoid dropping the watch on hard surfaces and set the time with light pressure. Keep it away from water and magnetic sources like tablets and speaker covers. A service every three to five years keeps a slim automatic running accurately.