Hi, welcome to the board!
Not Pavel Hlava -- his famous wedge shaped vases are made in the Sommerso technique (= several coloured layers of glass).
I would think your vase was made by ZBS (Železnobrodské Sklo), anytime between the 1950s and the 1980s (if the label says "made in Czechoslovakia"). ZBS are famous for their hotworked pieces, but did a lot of these single-coloured cut pieces, too.
Michael