Well Guys and Gals
below are a number of vases recognised until recently as Kralik -the range is often called Silberband -Some say they are amongst the finest Art Nouveau iridised glass made in Bohemia, each piece almost an equal to some of the highest quality Loetz.
-and yes I said 'until recently' for - A book from Passau Glass Museum now puts them as not Kralik, not quite even Bohemian but a few miles further north of Bohemia into Silesia and made by the company Fritz Heckert in what was then Germany.
Now books can be wrong and I think this books may have a few other dubious attributions (strictly my personal opinion).
But having managed to get some key parts translated from the German, like quite a few other people, I am now convinced much, if not all the silberband pieces, are by Fritz Heckert - including the all the ones below -They were all designed by Otto Thamm the then boss of Heckert around 1900.
Most importantly and persuasively the book includes many original design drawings, there are many more examples of drawing designs that there are examples of silberband at Passau. However if you look on the web you can find actual examples of many more of the drawn shapes.
The Book is 'Fritz Heckert Kunstglass Industrie 1866-1923' - by Stefania Zelasko -Glasmuseum Passau. -only in German so far but they are promising an English version.
well you learn something new every day.
PS sorry my filenames still say Kralik!