Fake Atmos 568: The Short Answer
A fake Atmos 568 is a replica of the Jaeger-LeCoultre Atmos Classique, the torsion pendulum clock built on calibre 568. The genuine clock has no battery, no winding key and no power cord. It runs on a sealed gas capsule that expands and contracts with temperature and air pressure changes. Most replicas fail that single test. If the clock needs a battery, a key or a plug, it does not carry an Atmos movement no matter what the dial says.
A replica is not a Jaeger-LeCoultre product and should never be sold or priced as one. Treat every listing as a copy until the mechanical evidence says otherwise.
What You Need Before You Inspect
- A 10x loupe and a bright, angled light source.
- Clear photos of the dial, the caseback and the rear capsule from the seller.
- The reference number and caseback serial in writing.
- A return window confirmed in writing before payment.
How to Check a Suspected Fake Atmos 568
- Look for a battery hatch, a crown or a winding key. Genuine Atmos clocks have none of these. A hidden compartment on the base is the clearest sign of a quartz or spring-driven copy.
- Open the rear and find the gas capsule. The real clock shows a sealed metal drum linked by a chain to the mainspring barrel. Replicas usually show a hollow block, a plain weight or empty space.
- Time the balance wheel. A genuine Atmos balance completes one full rotation per minute, so it turns slowly and evenly. A quartz copy ticks in small jumps. A cheap mechanical copy races or stutters.
- Find the transport lock. Genuine clocks have a lever that locks the pendulum for shipping. Many replicas omit it, which is why they arrive damaged or stop within days.
- Study the dial lettering under the loupe. Authentic printing has crisp serifs and even spacing. Replica dials show thick edges, filled counters and uneven spacing between the brand name and the model line.
- Check the glass and the case finish. Genuine cabinets use clean beveled glass with tight, gap-free miters. Copies often show cloudy glass, glue lines at the corners and soft polishing on the brass.
- Compare the caseback engraving to the paperwork. Replica makers reuse a small pool of serial numbers, so the same digits appear across many listings.
- Weigh the clock in your hands. A real Atmos feels dense for its size because of the brass frame and thick glass. A hollow copy feels light and rattles when tilted.
- Set it level and watch it for 24 hours. A working Atmos keeps running on temperature swings alone. A copy with a dead capsule stops once the spring runs down.
Questions to Put to the Seller
- Does the clock run with no battery and no winding?
- Is the gas capsule intact and photographed from the rear?
- Does the transport lock lever move and click?
- Will you accept a return if the clock stops within 48 hours?
Living With a Torsion Pendulum Clock
Once you own a working example, keep it on a stable surface away from doors, vents and direct sun. Lock the pendulum before any move, even a short one. A slow drift of a few minutes per month is normal for this design, so reset it against a reliable time source rather than chasing perfect accuracy. Clean the glass with a dry cloth and leave the movement alone. These clocks reward patience, not adjustment.