Direct answer
A fake Type XXI is a replica of the Breguet Type XXI aviation chronograph. Genuine Type XXI models use Breguet calibers such as the 582Q or 584Q, a 42 mm to 43 mm case, a sapphire crystal, and a signed rotor. Most fakes fail on pusher feel, date wheel font, case-back engraving depth, and the finish of the movement. The steps below let you separate a replica from a genuine watch without opening the case.
Prerequisites
Gather these before you compare:
- A clear reference photo of the model you are checking, from Breguet or a dealer listing.
- A 10x loupe or a macro camera phone shot.
- A caliper if you can measure the case.
- The watch serial and reference numbers from the case-back.
How to inspect a Type XXI
- Measure the case across the bezel. Genuine Type XXI cases run 42 mm to 43 mm depending on reference; most fakes run 1 mm to 2 mm smaller or larger.
- Look at the crown and pushers. Genuine pushers have a distinct click and a smooth thread; fake pushers feel loose or gritty.
- Check the bezel rotation. Genuine Type XXI bezels move in firm steps with no back play; fakes rotate free or wobble.
- Read the date window. Genuine date wheels use a font matched to the dial text; fakes use a generic font or misalign the number in the window.
- Inspect the dial printing. Breguet uses thin, sharp text with no bleed; fakes show thick or doubled print under a loupe.
- Examine the hands. Genuine hands are polished and lume-filled to the edges; fake hands show rough edges or uneven lume.
- Turn the watch over. Genuine case-backs carry deep engraving, a reference number, and a serial number that match the papers.
- Look at the movement through a display back. Genuine Breguet calibers show Geneva stripes, blued screws, and a signed rotor; fakes show plain plates or glued-on decals.
- Weigh the watch. A genuine Type XXI steel model weighs about 100 g to 120 g on a strap; fakes weigh less because of a cheaper case and movement.
- Test the chronograph. Start, stop, and reset the chronograph several times. Genuine pushers snap back to zero; fakes lag or fail to reset to 12.
Movement and case-back details
Breguet fits the Type XXI with in-house calibers and a 24-hour or 12-hour chronograph layout depending on the reference. The rotor is engraved with the Breguet name and the caliber number. Fakes use a generic ETA or Seiko-based chronograph module, so the rotor text is printed, not engraved, and the finishing stops at the rotor. Check the case-back screws: genuine screws sit flush and take a flat blade without slipping; fake screws strip on the first turn.
What replica grades mean
Replica Type XXI watches come in low, mid, and high grades. Low grade watches use a quartz or basic automatic movement, printed dials, and a mineral crystal. Mid grade watches add a sapphire crystal and a decorated rotor. High grade replicas copy the case shape and dial closer but still miss the movement architecture and the pusher feel. No replica matches the case-back depth, the date font, and the chronograph reset of a genuine Type XXI.