Emil, I don't think your vase is the Libochovice 1584 - the bird wings are different, and the whole just looks wrong. Pattern 1584 is given in the 1920's and the 1950s catalogues as 25cm (10") tall and made in clear, colours, and frosted.
Neither do I think yours is the version made by Rosice, pattern 2472, also given as 25cm tall, but in the taller, slimmer shape of yours (see the 1957 Rosice catalogue on the CD - page 34) as the base shape and the top rim style are different.
What are the dimensions of your vase, Emil?