Glad you were able to find the mark. The form of your vase did look like Kralik to me.
As an aside -- Marcus brought up a good point about the Kralik marks the other day that made me realize we can get into a circular logic. From what Marcus wrote (paraphrasing much), the marks were attributed to Kralik because certain pieces thought or known to be Kralik had the marks. So when we see the marks, we assume the pieces are Kralik. The problem that he mentioned is we don't know if the marks are exclusive to Kralik. From what he wrote, the Kralik records won't be unsealed in our lifetime, so we won't be able to see their catalogs to check the attributions.
So... I'll just trust the people who are knowledgeable about Kralik, e.g. Alfredo, until other information becomes available.