Jaeger Lecoultre Hybris Artistica Grande Reverso Tourbillon Skeleton.
You know the Reverso Skeleton Tourbillon Platinum from 2005 limited to 35 pieces very well, but there is something much rarer, the Grande Reverso Tourbillon Skeleton belonging to the Hybris Artistica Collection, from 2014. Only 3 pieces were made!
I could see it once in real, I doubt I will ever see it again.
Here we have a 48, 4 x 29, 9 mm case made in white gold and crystal, hand decorated plate and bridges.
While it is, indisputably, a very nice Reverso, I much prefer the 2005 version, for its more modern skeleton and its smaller GT case.
The 2005 version: