I am very surprised by the maker! Walther isn't normally my kind of thing, but these are wonderful.
Dear Samantta,
Glass is a really huge area to try to research, Anne Tique knows a lot of wonderful stuff and is an incredible help here, but nobody can ever know any more than some small areas, reasonably well.
I think your vase with the applied enamels is of a different age and it might be somebody else who would know about it.
Not everybody comes in every day. Have a little patience and see if somebody else knows.
We don't give up.

We were all beginners once.
And we are all still learning from each other.