Of course, 100 per cent Skrdlovice and Jan Beranek design. I am not sure though of the chronolgy though when an added casing of clear occured or alternative colours. This certainly appears to be an early colourway though. It could also be an earlier version of the same pattern than the picture attached, perhaps the design grew slightly wilder over time, since aside from fancy photography, there is certainly much more clear glass on this attached one and more "hot working." Graham Cooley displayed one at Broadfield as part of the Hi Lo Sklo exhibition, that was near identical to yours, all are Jan Beranek vases from the same pattern,
Robert