Pretty sure these were made under the Karlovarske Sklo label at some time, though the Mstisov confusion issue is relevant too, as previous threads explain. There is also a thread suggesting this pattern was made there, as I have seen a labelled example. The same colourway and nipped rim tall vases occur, up to 30cm and are good quality items. Other colourways exist too, though this seems to have been most popular.
Robert (bOBA)