Jindrich will know about this already, and may have further comment to make.
One of these vases (at 26cm) high) appeared in the recent Sypka (sypka.cz) Czech glass auction in Prague as lot 160. It was attributed to Miroslav Klinger from the 1960s-70s, and is apparently shown in Sindelar's book, in Volf Petr's publication 'Forty Years of Existence of Zeleznobrodke Sklo' and in the 43/1988 edition of GR, by which I presume they mean Czech Glass Review.
Not typical of his style for sure.
P.S.; it's well worth checking the auction out, all, as the estimates seem very reasonable to me when compared to prices in the UK/US/Western Europe. I'm not sure what the lots actually fetched, nor am I sure how shipping would work, but it's worth a look anyway to enrich the eyes and mind!