I was just about to amend my post. I was querying my memory as well especially since I found reference to Karneval in Jindrich's pics of the CGR 73 - 2 and the decor looks different. I found a post where Marcus refers to CGR 73 May edition and the Karneval range, but I'm not sure that is edition 2? It may be that he was referring to edition 5 which is not on Jindrich's fabulous links.
To clarify, I have another vase bought a few months ago at the glass fair. I think I recall when I bought it that I was told it had been id'd as a 'test' or 'trial' for one of either the Flora or Karneval range and designed by Frantisek Koudelka but never put into production. I thought I remembered Karneval, but I am now thinking perhaps Flora particularly since there is a splodge of yellow in the large vase as well. I can't find my notes at the moment annoyingly, but I believe I recall the sellers said Mark Hill had id'd it. And I have seen this vase (or one the same as it) in the display pictures of the Hi Sklo Lo Sklo exhibition (scroll down to picture 4 down on the link), set with other Prachen vases.http://markhillpublishing.co.uk/?page_id=842
Having now bought this large vase and setting them both together, I am pretty much certain that they are the same range, designer, maker. Hence my reference to Prachen and Frantisek Koudelka. For reference, the pontil marks are also finished in the same way, ground and smooth and polished, but not shiny.
pics below -
thanks again for replying, it is appreciated.