Glen, thank you so much for asking your friend about Meri Lasi - this certainly answers the question definitively for me. Muurla has continued with the design I have as you found for me on their website.
My next question has to be, of course, what on earth is a "centrifugal casting mould" and how does it differ from the pressed moulds that Adam D has been telling us about in another thread?
Thanks for your information and help in tracking down Meri Lasi.