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Montblanc

Yes it is... like in every tourbillon....

 

The big advantage is that the cage itself is much lighter so less energy is needed to turn the cage, and more can be used to keep a good amplitude on the balance.
I think that this type of tourbillon, I would call it half-flying, also has advantages in shock resistance as one end of the balance wheel is pivoted in a bridge fixed directly to the plate. (as opposed to pivoting in the cage which is pivoted in a brige on the plate)
And of course there is no cage to block the view of the balance, hairspring and the escapement turning.
I love it.
Don

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