If you want a replica Atmos 566 that looks and behaves like the original, prioritize the bellows and the suspension. The Atmos 566 is a Jaeger-LeCoultre clock caliber that winds itself from temperature changes. A good replica should have a working bellows that expands and contracts, a free-hanging torsion pendulum, and a case that matches the proportions of the genuine piece. Skip any copy that uses a battery or a quartz movement because it defeats the purpose of the Atmos design.

What to Look For

  • Bellows: A functional bellows made of metal or a gas-tight capsule. It should expand and contract with temperature shifts. Test it by warming it with your hand.
  • Suspension: The torsion pendulum must hang freely and rotate without sticking. Check for a smooth, even swing.
  • Case and glass: Brass or gold-plated brass with no sharp edges. Glass should be clear mineral glass without distortion.
  • Dial and hands: Printed indices and proper font. Hands should be polished or blued, not painted plastic.
  • Finish: Consistent plating, no flaking, and tight seams between case parts.

Parameter Bands

  • Dimensions: Height 20 to 25 cm, width 15 to 20 cm, depth 10 to 15 cm. Genuine Atmos 566 is about 22 x 18 x 13 cm.
  • Weight: 2 to 4 kg for a replica, depending on materials. Genuine is around 3 kg.
  • Power reserve: Days to weeks for replicas with a working bellows. Genuine runs for months or years.
  • Accuracy: Within a few minutes per day for a replica. Genuine is far more accurate.
  • Materials: Brass, mineral glass, steel. Avoid plastic parts.

Common Pitfalls

  • Non-functional bellows that are just decorative.
  • Battery or quartz movements, which have no winding knob or bellows.
  • Cheap plating that flakes off within weeks.
  • Misaligned hands or dial printing.
  • Suspension that sticks or wobbles.
  • Incorrect proportions, too large or too small.

FAQ

Does a replica Atmos 566 need winding?

A true Atmos replica with a working bellows does not need manual winding. It winds itself from temperature changes. If it has a winding crown or a battery, it is not a proper replica.

How can I tell if the bellows work?

Warm the bellows with your hand. A working one will expand and contract, moving the winding chain. You can also listen for the faint click of the winding mechanism.

What is the difference between a replica and a genuine Atmos 566?

The genuine uses a sealed capsule with a specific gas mixture. Replicas may use air or a different gas. The finishing and materials are also lower grade. Genuine is a lifetime investment.

Are replica Atmos 566 clocks worth buying?

If you want the look without the cost, a high-quality replica can be a nice display piece. But do not expect the same longevity or accuracy. Buy from a seller who shows the movement working.