yes you don't see many of this type of glass outside of the Czech Republic, it seems to have not been exported a great deal, though obviously yours made it! Your other half did a really good spot for you there! It is not typical Beranek pulegoso style glass with the rough surface, it is cased in clear. The quality is pretty impressive isn't it? I think they just made this type of glass whenever the resources were found to achieve it in a given month, when some good metal or fuel, higher temperatures, allowed a different kind of glassmaking for a few weeks, using the exact same patterns.