Robert, thank you so much for the additional info!
As I said, it came as quite a surprise to me as well that Jindra Beranek made a piece like this (though I have seen quite a lot of pieces by him during the past years, and several of them were copies of -- or inspired by -- Emanuel Beranek shapes, but none of later Skrdlovice patterns so far).
The base finish and signature are very typical for him, so I have no doubt about it being a "real" Jindra Beranek
If on purpose or not, the shape towards the top is not as perfect as in Skrdlovice Vizner vases, and neither are the swirling air bubbles as nicely executed (I guess it is far from easy -- even for an experienced glass maker -- to produce such a piece).
Though a very attractive vase, I would have prefered if it was a little bit more Jindra and less Vizner (shape, colours...)