Thanks a lot to you all !!!
With the last given pictures i think i now have an idea about the differences of these pieces. All, the pattern, the surface, the colour looks little different. The hole impression is little different to the Kralik's. The look-and-feel, the graze is missing at my one somehow.
Will go for the Jan Zeeman attribution untill further notice and will check out his pieces....
thanks again,
Tom