Craig, thank you so much for your in depth answer!
Your site is always the first I go to when I try to research glass from that region/period.
And thanks for posting the pics.
That collection of satin spatter is great, and even with my limited knowledge I spotted a few satinated Kralik pieces there.

(And some pieces with a faint similarity to my vase, looking at the colours and the stripey pattern)
Regarding the Bohemia issue:
The way I used to apply these terms was up to now: pre 1945 -> Bohemian, post 1945 -> Czech(-oslovakian, to be correct).
But I see that this may not be the correct way, so I will be a little more careful in the future

Michael
P.S.: a possibly very stupid question: how many makers could have made these spatter glass pieces? -- Is it just a matter of attributing them to one of the makers we know have produced this style? (So it is either Kralik or Welz or Ruckl, and we just don't know which one)
Or are there dozens of other / unknown companies massproducing spatter glass in the 1920s/30s/40s?