@Moritz_Kleine
It's very similar to the settebello but unfortunately there is no more settebello trains surviving today.
It's the ETR250 Arlecchino made of only 4 wagons. There is only one train remaining of that series and it is used for movies and special occasions.
But the original Gio Ponti's furniture has been deleted to refurbish the train with a more "modern" look...what a pity!