Thanks a lot, Dirk -- great info!
And it would explain (once again, thinking of my Ikora style lamp bases) the abundance of these vases in Austria, considering that Reich/Krasno was based here.
They must have been extremely popular, there is not one fleamarket or carboot sale where I don't see at least one of them...
You are right that they are nicely made, thin glass etc., just the unpolished rim was different to my other "Bohemian" pre WWII pieces.
I guess date of production should be somewhere between the 1930s and 1950s?
Michael