Topic: Heavy glass dish - who made it when - and how?

[Wuff]

I am not sure if "dish" is the right word for this heavy (3.4 kg) piece of glass, about 21 cm squared and close to 7 cm high.
The inside is completely smooth - no indication of a seam or the like visible.
The outside is structured, a bit like a rough bark.
The base (pictures in the second post) is also quite smooth - only in one corner there is an indication of a joining.

How would this be accomplished?
Any comment on the maker would obviously also be very welcome.
It was bought in Switzerland.

Best regards - Wolf

[rocco]

Vladislav Urban for Rosice (Sklo Union, Czech pressed glass), 1969 >> Link

Michael

[Wuff]

That was fast, Michael ... thank you! You've beaten me to my second posting as I had to watch Champions League, second half Basel against Chelsea 1:0 .

As already mentioned above - some pictures with the item upside down.

What I still would like to learn: how was it made?

[Lustrousstone]

Pressed in two-piece mould I would say

[Wuff]

Thanks - I had also done some more research of my own - seems to be pressed glass. What distracted me was the very smooth finish, which is different from the other pressed glass in our collection: reheated - high enough temperature to "melt away" the seems - but not too high to prevent deformation .

[Lustrousstone]

It will have been a very simple mould in terms of construction, so the only seam you can see may be all there is. Many Sklo Union ones were. Think of it as a thick plate. Pressed plates don't have seams