I handled the vase extensively and took many images of it. Oh, that's right, I posted it....
It is unlike any piece of Kralik I have seen, or seen an example of......
Completely different. It is unlike their cameo work..... It is textured unlike other known examples.... the clear finish bottom is not found on any of their other work, especially with a huge over sized pontil area, and the enamel work is unlike any Kralik example that I am aware of, other than possibly the one similar piece you reference as being in the Kralik case at Passau.
Regardless of the Passau example, and regardless of Alfredo, I still do not think it is Kralik..... One similar sample in one case is not an attribution....... There have been Kralik pieces in Loetz cabinets at Passau, there have been Kralik pieces in Rindskopf cases at Passau, there have been Kralik examples in the unknowns at Passau...... and those are only the mistakes I can recall quickly relating to glass I have an interest in and cases I have seen images of...... but I guess they could have been correct on everything they put in the Kralik case... IMHO odds would be against it, but I suppose it could be possible.
It is a great collection of glass and a great museum, but they are understaffed and likely a little overwhelmed.....
Feel free to post any supporting documentation you can get from them to reinforce the attribution.... I would be very interested in seeing it....
Until then, I retain my strong doubt....
Just my humble opinion....