Let me complain a bit Norman.
You often use term Sklo Union for all Czechoslovakian glass production. Sklo Union had produced (speaking about our subjects) pressed glass only. Free blown glass had been produced in several factories in Czechoslovakia - mainly Škrdlovice, Chřibská, Nový bor and Železný Brod, to world exported through Skloexport or Glassexport. Also pressed Czechoslovakian pressed glass had not been produced only in Sklo Union concern but also in Jablonecké sklo and other factories.
I know that for foreigner people is hard to distinguish between Czechoslovakia and Czech...
So very little hint.
Czechoslovakia had existed from 1918 to September 1938. Than from September 1938 to March 1939 stat had name Czecho-Slovakia. From 1939 to 1945 we had here Protectorate Bohemia and Moravia and Slovaks had own Slovak state. From 1945 to 1992 existed again Czechoslovakia. Since January 1993 up ti now we are Czech republic and our Slovak friends live in Slovak republic as separate states, both members of EU.
Even the most glass production traditionaly had been fabricated in Czech part of Czechoslovakia, some Slovak s factories also cannot be ignored.
The glass you often display here is "Czechoslovak glass" so being fabricated after war to the fall of communismus in our country.
This would be the best expression, I suppose. Not "Sklo Union" but rather "Czechoslovakian glass" when you talk about glass fabricated in my country after WWII.
Jindrich