Anne - That's a great idea. I thought I'd email Desna and ask if they could tell me anything, but I couldn't find an address on the internet.
I have also found a modern version called the Franmara Amphora, but again I can't find an email address.
Ivo - Austria sounds good, but how could I find out? I'm a glass novice and I have no books, and I've no idea yet where I might get some. Any advice you could offer to set me in the right direction would be wonderful.