A version of this vase was produced for a few years by the successor to Skrdlovice, Beranek Glass SRO. 9279, sold from 93 to 2007 probably. They are very similar but slightly different too, there is no polished pontil rod mark on those and there are other differences. You possibly saw old stock. Similar aged stock was still being sold this summer on Murano, seen by a GMB member in an interesting thread.
The older vases were probably sold circa 1945-6 to circa 1950 only.