Hi Mike,
This type of ware, whilst outside my normal sphere of study, has intrigued me for a long while. Much, as you comment, is attributed to Kralik, but little factual evidence to show which factory, has been produced. Certainly Kralik's factory at Vimperk, is an unlikely candidate, as it came under the control of Moser, Karlovy Vary, shortly after WWI, and its recorded production was allegedly, " a speciality heavy, massive crystal, topas, uranium, amethyst and other glasses of great technical perfection and in beautiful tectonic forms richly cut in broad facets." Only the Lenora factory appears to have remained in Kralik family hands, after WWI. The description of that factory's production includes "laminated and crystal glass", of which, I presume, "laminated" might be a suitable term to cover this type of glass. Yet being able to prove that remains a difficult proposition.
It might also be necessary to spread the net a little wider, and clearly we need to try to find out what the inter-war production of the Stefan Hrdina a Syny works at Chlum u Trebon was. Certainly under the communists, the Cesky Kristal n.p. member factory as it became known, had a record of producing this type of ware, some later examples designed by Jan Gabhrel.
(Source of quotes: "Modern Glassmaking in Czechoslovakia" Dr Jindrich Cadik, undated essay, (mid-1930s) published by Hippmanova, Praha.)
Regards,
Marcus