The short answer: a fake 7787BB usually gives itself away in three places. The dial is lacquer instead of fired grand feu enamel, the moon phase runs on a 24-hour day/night disc instead of a real 29.5-day cycle, and the movement under the sapphire back is a decorated base caliber rather than a finished Breguet 591 DRL. If you can get the watch in hand and open the back, the question is settled in about five minutes. If you are working from photos, you need macro shots of the dial edge, the caseback hallmarks, and the movement, and you need to be honest about the price.
Breguet 7787BB Replica Guide: What to Check Before You Buy
What the 7787BB is supposed to be
This is a Classique in 18k white gold, 39 mm across, with a grand feu enamel dial, a power-reserve sector, and a moon phase. It is a dress watch built to a standard, not a value proposition. That matters for authentication because the cost of doing enamel properly is high and the cost of faking it is low. The gap between those two numbers is where most counterfeits live.
Counterfeit Breguet 7787: How to Spot a Fake Classique
Start with the dial
Enamel versus paint
Real grand feu enamel is glass fused to metal at around 800 degrees Celsius. Under a loupe it has a faint orange-peel texture and a wet, deep look. It also chips rather than scratches, and it often shows tiny trapped bubbles or a slightly uneven edge where the enamel meets the chapter ring. Copies use lacquer, epoxy, or printed film. They look flat and plasticky, and the surface shows swirl marks from polishing rather than the dull gloss of fired glass. Hold a suspect dial at an angle to a window. Enamel goes quiet and dark. Lacquer throws a hard reflection back at you.
Printing and hands
The Breguet numerals and the logo should be crisp under 10x magnification, with sharp serifs and no spidering at the edges. Blued or polished hands should show beveled edges and a clean bore at the center arbor. Fakes often have stamped hands with rounded, soft edges and a center cap that sits proud of the hand body. Check the tip of the hands too. The Breguet moon-tip is a shaped ring, not a blob of metal.
Some Breguet dials carry the historic secret signature, an engraved name hidden in the dial and readable only at an angle. Look for it. Do not treat its absence as proof either way, since not every reference and variant carries one.
Case, weight, and caseback
Eighteen-karat white gold has a density close to 15.5 g/cm3. Steel sits near 7.8. A real 7787BB has a heft that surprises people who are used to stainless steel, and the caseback lip feels dense and cold. Most fakes are steel, sometimes plated, sometimes with a tungsten insert to fake the weight. Weighing it on a kitchen scale against a known reference is crude but useful.
The fluted caseband should be even, with sharp crests and no tooling marks between the flutes. Look at the lugs from underneath. Real Breguet lugs are polished and finished on surfaces nobody photographs. The caseback engraving is the next tell: reference and case numbers should be deep, sharp, and consistent in font, and they should match the paperwork. Fake engraving looks laser-etched, shallow, and slightly fuzzy at the edges. Hallmarks should be struck cleanly into the metal, not stamped on a thin plate.
The movement decides it
Ask the seller for a clear photo of the movement with the back open. On a genuine 7787BB you are looking at the Breguet caliber 591 DRL: proper bridges with Geneva stripes, polished bevels that catch light along the full length of the edge, blued screws seated in countersunk holes, and engraving that is cut into the metal rather than applied. The Breguet name and the caliber number should be legible and correctly spaced.
Counterfeits use a Chinese or Japanese base movement with a decorative plate screwed over the top. Signs include bevels that are polished only on the visible side, stripes that stop short of the edges, and screws that are painted blue rather than heat-blued. Heat-blued steel has a slight iridescence. Paint looks like paint.
Moon phase and power reserve: functional tests
These two displays are where super clones get lazy. A real moon phase advances once per lunar day and completes a cycle in about 29.5 days. Push the corrector and watch it move in small, deliberate steps. If the disc clicks forward a full phase each time, or if the aperture shows a flat printed moon on a paper disc, walk away.
The power reserve should respond to winding. Wind the watch fully, note where the hand sits, and check it over the next day. A decorative hand that never moves is a common fake. Look at the sector markings as well: they should be crisp and filled, not silkscreened onto a flat plate.
Box, papers, and price sanity
A complete set helps, but paperwork is easier to counterfeit than the watch. Treat the box as supporting evidence, not proof. The same goes for a dealer's story about a collection being liquidated.
Price is the bluntest filter. A real 7787BB trades well into five figures in US dollars. If an offer sits at a small fraction of that, the watch is not real, whatever the photos show. Nobody sells a functioning white gold Breguet at a discount that deep by accident.
A field checklist
- Dial surface checked at an angle for orange-peel texture and depth
- Printing and hands inspected at 10x for soft edges and stamped tips
- Case weighed or felt for white gold density
- Fluted caseband and hidden lug surfaces examined for tooling marks
- Caseback numbers read against the certificate
- Movement photographed and bevels checked for hand finishing
- Moon phase advanced with the corrector and timed
- Power reserve wound and observed over 24 hours
- Price compared against current dealer listings
The practical move is to make the sale conditional on a watchmaker opening the case. Any honest seller of a real 7787BB will agree to that. A seller who will not is telling you something.