A vase many GMB members have in their collections! As usual, I think you are probably correct Anik, I like these vases a lot. A nice example, as for early, I don't know, topas and clear was used extensively for almost the whole time of the factory production, post 1950 (and these vases were produced for a long time too). The very early ones, only judging from what I have read and seen, this vase seems to have had a less ornate, less worked, casing of clear so I would "guesstimate" mid 60's on, for this style, which I prefer anyway, ornate and heavy can be good I think! I am sure it will look great in your collection... A classic Skrdlovice vase.
Robert (bOBA)