Interesting as I have a 30cm one these languishing unknown in the shop, so now we have a name 'Granada', product code ''06 012" for a 20cm version and a factor Rastal based in Germany. We also have a possible maker of Podebrady... Jindrich do you have a source for the attribution. Must review the piece I listed to see if it is lead, tint looks like soda in pics. LINK