Robert, thank you so much for the additional information on Jindra Beranek!
I too think that his work is underestimated...
What was new to me in the certificate is the fact that he had a sales room in Vienna, which explains that his pieces can easily be found locally.
The Skrdlovice influence is often visible in his work IMHO, sometimes in a subtle way like in this vase (Greg was very good when he mentioned Ladislav Oliva at the very beginning of the thread), sometimes getting a little too close to the "originals", like in
>> this Vizner whirlpool copy, or when he repeats 1950s Emanuel Beranek designs -- but always masterly executed.
A sort of “signature shape”, which seems unique to him, is the pink one I showed above with the purple blobs. Can be found without any decoration, with bubbles (like some
>> here in Dusan’s gallery), with streaky patterns etc.
Robert, if you like, please do post pics of your multicolour vase -- I may be able to tell if it is his work or not.
I saw a few of his 3-openings vases which were unsigned; the big circular polished pontil is the dead giveaway...
And by accident I found another vase by him today, small piece at 10 cm height, lovely pink opalescence with white powder stripes

Plus a pic of a brown bowl which I sold some time ago.
OT: the sellers I bought my tall vase from had several stunning pieces of art glass from the Dittrich collection for sale; most of them were cut pieces in a real Czech studio style, some of them signed, but as I am not so much into cut cubes (and honestly didn't recognize many of them) I went for this one, and a very good German vase.
Michael