The short answer
A fake Breguet Type XX is a replica of Breguet's aviation chronograph, and the ones that hold up are built on a correct case: 39mm or 42mm depending on the reference, a fluted caseband, welded lugs with screw bars, and a dial layout that matches the model being copied. The cheap versions expose themselves in three places. The fluting on the caseband looks stamped instead of cut. The chronograph pushers feel mushy and the reset snaps back in one jump rather than a true flyback. The date window is the wrong shape or sits in the wrong spot. Get those three right and you are looking at a decent copy.
What the Type XX actually is
Breguet built the original Type 20 for the French naval air arm in the 1950s, and the design brief was utility: a black dial, big luminous Arabic numerals, a rotating bezel on the earliest versions, and a flyback chronograph the pilot could restart with a single push. The modern line splits into two shapes. The Type XX (reference 3800 and its relatives) runs a 39mm case with a 30 minute counter at 3 and running seconds at 9. The Type XXI (reference 3810) goes to 42mm and adds a central minutes hand plus a 24 hour indicator. In 2023 Breguet reissued the Type XX as reference 2075 with an in-house flyback calibre, which is the model most current fakes are trying to be.
That history matters when you shop, because it tells you what a copy has to reproduce. A rep that skips the flyback is not copying the watch. It is copying a photo of the watch.
The tells that matter most
The caseband fluting
Breguet's coin edge band is a machining problem. On a real Type XX the ridges are crisp, evenly spaced, and catch light along their full length. On a cheap fake they are shallow, and the spacing drifts near the lugs. Run a fingernail across them. If it slides instead of ticking, that is your answer.
The chronograph feel
Push the top pusher. A flyback movement restarts the running chronograph instantly, with no stop and reset in between. Most budget replicas use a Valjoux 7750 style movement, and a 7750 cannot flyback, so a seller claiming one is either confused or hoping you are. The pusher on a good copy has a short, positive travel. The reset should be one clean snap.
The dial and printing
The "BREGUET" script is the hardest thing to fake at scale. Look at the tail of the G and the way the letters connect. Check the lume color too, since older Type XX dials have aged to a warm cream while new fakes often ship with a bright white that looks wrong against a steel case. The "Swiss Made" at 6 o'clock should be thin and sharp, not fuzzy at the edges.
The caseback
Type XX casebacks are solid and engraved with the reference, the serial, and the model name, plus a sapphire window on some versions. Engraving should have visible depth. Laser etching on a flat surface with no relief is the giveaway.
What a good 1:1 copy gets right
- Case dimensions within a fraction of a millimeter of the real reference, measured with calipers and not eyeballed
- A fluted band cut with a proper tool rather than cast
- Double sided anti reflective coating on the sapphire, which changes how the dial reads in daylight
- Correct lug width, usually 20mm on the 39mm cases, so real straps fit without filing
- A rotor and bridges that are decorated rather than left raw, in case you open it
- Strap hardware that matches the reference: a signed tang buckle or a deployant with the right engraving
Movement questions to ask
Ask what powers it and listen to the answer. A modified 7750 gives you a reliable, serviceable chronograph with a 30 minute counter, but no flyback and a thicker case. A Seagull ST19 based movement is slimmer and prettier to look at but fussier to service in the US. If someone tells you the copy has a genuine in-house flyback at a replica price, they are selling you a story.
Sizing and wear
The Type XX is a pilot watch, so it wears bigger than the numbers suggest. A 39mm on a 7 inch wrist sits flat and disappears under a cuff. The 42mm Type XXI is a different animal. If you are between sizes, go smaller, because the fluted band already adds visual width.
A quick checklist before you pay
- Confirm the reference you actually want, XX or XXI
- Ask for a photo of the caseband in raking light
- Confirm flyback or no flyback, in writing
- Check the date font and position against a real dial photo
- Ask for the lug width
- Ask what happens if it arrives with a crooked index marker
None of this is complicated. It is just the difference between buying a watch and buying a picture of one.