Short answer
A fake Atmos 568 is almost never a cloned Jaeger-LeCoultre movement. The Atmos runs on a sealed gas bellows and a chain-driven mainspring, and nobody reproduces that at scale for a price anyone would pay. What you run into instead are three things: Atmos-shaped clocks hiding a quartz module, genuine clocks sold with swapped or mismatched parts, and photo-only scam listings that never ship. The "568" is a caliber number, not a case design, so two real Atmos 568 clocks can look completely different from each other.
Why the Atmos is hard to fake
The Atmos runs because a hermetically sealed bellows expands and contracts as the temperature moves, and that motion rewinds the mainspring through a tiny chain. A swing of one degree Celsius is enough to keep it going for about two days. Jaeger-LeCoultre has been refining the idea since the late 1920s, and the tolerances are unforgiving. The gear train runs on almost no torque, which is why the parts are so light they feel like foil. Servicing one takes a specialist with the right tools and a stock of spares. Building a convincing copy from scratch is not a business plan.
What counterfeit Atmos clocks usually are
- Quartz clocks with a decorative drum on the back that looks like a bellows but holds a battery
- Generic 400-day or torsion clocks sold with an Atmos-style dial and a wrong signature
- Real Atmos cases paired with a later, lower-spec caliber and a mismatched serial range
- Listings using lifted photos of a genuine clock, where the item does not exist
The tells that matter
Start with the movement. A genuine Atmos has no crown, no winding stem, and no battery hatch. If you can wind it or open it for a cell, you are not looking at an Atmos movement at all, no matter what the dial says.
Then look at the chain. On a real 568 the chain is a miniature metal link chain, fine enough that it looks like jewelry. Copies tend to use a nylon thread or a molded plastic strip. The bellows canister should be a sealed metal drum with neat seams. A decorative disc that spins freely or rattles is a giveaway.
Check the signature under magnification. Dial printing on genuine clocks stays sharp at the edges, and the fonts match across the dial and the case back. Blurry or doubled printing, a logo that sits crooked, or a caliber stamp that looks stamped by hand with a punch are all reasons to walk.
Listen to it run. A healthy Atmos is close to silent, with a balance that rotates slowly and evenly. A tick, a buzz, or a second hand jumping once per second means quartz.
Where buyers lose money
Most losses do not come from a clever clone. They come from genuine clocks with problems. A caliber 568 that has never been serviced in thirty years may run for a week and then stop, and a full overhaul runs into several hundred dollars plus parts. Cases get polished until the edges soften. Glass gets replaced with something that does not match the period. A seller quotes a reference number from a catalog photo while the actual clock on the bench carries a different caliber.
Photo-only listings are the other trap. If a seller refuses a live video call, will not photograph the movement with a dated note beside it, or pushes you toward a payment method with no recourse, treat the listing as fiction.
What to ask before you pay
- Send a photo of the calibre marking and serial, not just the dial.
- Confirm the clock runs on temperature change alone, with no winding and no battery.
- Ask when it was last serviced and who did the work.
- Request a short video of the balance in motion, filmed today.
- Ask about the case, glass, and dial: original, restored, or replaced.
- Get the return window in writing before money moves.
Bottom line
If you are searching for a fake Atmos 568, the useful question is not whether someone cloned the caliber. They did not. The useful question is whether the clock in front of you is a real Atmos, a real Atmos with non-original parts, or a quartz object wearing the name. A crown or a battery door settles it in seconds. Everything else comes down to markings, the chain, the bellows, and service history.