To set your Atmos clock to the right time (including the summer/winter time change), move the minute hand forward with one finger. Note: never turn the minute hand anti-clockwise and never touch the hour hand. Make sure that the balance is locked before setting your clock.

How does the Jaeger Lecoultre Atmos clock work?

A clock that lives in the moment When the temperature rises, the gas expands, which in turn expands the capsule. When the temperature falls, the gas contracts, which in turn reduces the size of the capsule. Each time the capsule changes, it activates a small chain, which winds the clock.