The fake Type XXI 3817 V6 is a replica of Breguet's 42 mm flyback chronograph, built as the sixth major revision of a widely traded replica model. It copies the steel case, the multi register dial and the strap hardware, but it runs on a third party automatic chronograph movement instead of Breguet's own caliber. That single difference explains most of what separates a convincing example from a disappointing one.
What the "V6" label actually means
V6 is a version tag used by replica sellers and workshops, not a Breguet reference. It normally signals the sixth round of updates to the same replica, covering small changes to the dial print, the case profile, the crystal height or the movement holder. Because the label is informal, two sellers can describe the same watch as V6 while shipping slightly different builds. Always judge the photos and specs, not the version number.
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The genuine Type XXI 3817 in short
Breguet's Type XXI 3817 belongs to a family that traces back to watches supplied to the French air force in the 1950s. The modern 3817 is a steel chronograph with a flyback function, a fluted caseband, and a layout that is easy to recognize once you know it: a central chronograph minute hand, small running seconds at 9 o'clock, a 12 hour chronograph totalizer at 6, and a 24 hour day and night indicator at 3.
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That layout is the reason the Type XXI is copied at all. It looks technical and readable on the wrist, and the combination of a central minute counter with a 24 hour display is uncommon in any price bracket.
Case, crystal and finish on a V6 replica
The case should measure close to 42 mm across, with lugs that curve down toward the wrist. On a good build, the fluting on the caseband is cut evenly and the same depth all the way around. Look closely at the transition between brushed and polished surfaces: on weaker replicas the brushed grain wanders over the edge, and the polished bevels look rounded instead of crisp.
The crystal should sit flush or slightly proud of the bezel, with no glue haze at the edge. Pushers should travel with a firm, even click and return to their resting position without wobble. The crown should screw down smoothly and line up its logo upright when closed.
Dial, hands and subdials
- Print quality: numerals and track marks should be sharp, with no ink bleed or misalignment between the 12 and 6 positions.
- Subdial spacing: the three counters should sit in the same relationship as the genuine dial, not crowded toward the center.
- Date window: the aperture should be cleanly cut, with the date centered and no white edge showing on one side.
- Hands: hour and minute hands should reach the minute track without overhanging it, and the chronograph hand should rest exactly at 12.
- Luminous compound: it should be applied evenly, not pooling in the corners of the markers.
The flyback chronograph and movement
This is where the fake Type XXI 3817 V6 either earns its place or falls short. Start the chronograph and watch the central minute hand. It should move in small, consistent jumps rather than drifting or stalling. Press reset and the hands should snap back to zero together, with no overlap or hesitation.
Flyback behavior matters too. On a working flyback, pressing the reset pusher while the chronograph is running restarts it immediately instead of requiring a stop and reset sequence. Many replica movements mimic this visually without the correct internal mechanism, so test it before money changes hands. If the caseback is clear, check that decorative plates and rotor engraving are not screwed down over a cheap movement with visible gaps.
How a V6 compares with earlier versions
Later revisions usually improve three things: the case silhouette, the dial print, and the fit of the bracelet or strap. Earlier builds often show a thicker bezel, softer lugs, or a crystal that sits too high. If you are comparing listings, place the photos side by side at the same size. The differences that matter are almost always at the case edge, the dial center and the crown guards.
Pre-purchase checklist
- Request photos in daylight, not studio lighting, from front, side, caseback and wrist.
- Ask for a short video of the chronograph starting, stopping and resetting.
- Confirm the case diameter, lug width and strap type in writing.
- Check that the seller shows the exact watch being sold, not a catalog image.
Red flags to walk away from
- Blurry photos that hide dial edges or the crown area.
- No video of the chronograph running, only still shots.
- A description that copies genuine specifications word for word.
- Pressure to pay outside the platform's normal process.
Bottom line
A good fake Type XXI 3817 V6 gets the case shape, the dial layout and the chronograph behavior right at arm's length. Judge it on those three points, ask for real photos and a running video, and treat the version label as a starting point rather than proof of quality.