I have stumbled across Kralik glass after seeing affordable but damaged examples on Ebay. Interestingly it seems Kralik are said to have been one of the largest art glass producers of the 20th century. Kralik’s art glass is labelled under the term bohemian, which is a term used for glass that was produced in Bohemia and Silesia, regions of Czechoslovakia, now known as the Czech Republic.
A brilliant insight into the history of the glass can be found here: http://www.nouveauglass.co.uk/kralik-glass/
I’ve looked around for comprehensive identification pictures of Kralik Glass and this is the best websites i have found are: http://www.20thcenturyglass.com/glass_encyclopedia/bohemian_glass/kralikglass_home.htm