The demand for the atmos was to create a poetic clock that integrate an equation of time (it is the difference between apparent solar time and mean solar time) one of the hightest complication in watchmaking.

So i get inspired by the book of Andreas Cellarius, an ancient astronomic scientific that discovers constellations that you can find closely at the same place today in the sky...
On a turning dial center you can look at a big sky with the right positions constellations.

What a dream to have a sky in a watch!

When they proposed me to design The "Master Grande Tradition à Grandes Complications", i displayed a big blue sky in the center of the watch in order to have the biggest opening view on the top. A big sucess, a flying tourbilllon on a sky with a "guilloché main" that reveal constellations....and on the back a minute repeater.