And also reproduced in the 90's by Beranek Glassworks "Skrdlovice".
I have read this a few days ago, but it can not confirm 100%
I have 4 of dose, and I noticed the one base is grinding?
May someone can give me a bit help with the Press glass Base to recognize the difference between the Sklo Union Glassworks
Wish you all a sunny Sunday
Sergio