A 1968 design by Frantisek Peceny for Sklo Union (made by Hermanova Hut). The design is 'op art' and asymmetrical with 3D curvy ovals and circles and ripples and curved ridges round. Pattern no 20156/180 (180 is the height, 180mm). Clear and heavy moulded glass vase with typical Sklo baseline. A hard to find design, a tactile curious vase that's different in each direction.
18cm tall x 7cm widest (there is a bigger version as well). Weighs 620g. Circa 1960s-1970s vintage. 
Very good condition, I can't see any chips or flaws.  
Free P&P to the UK.