Well, thx Jindra! Welcome back. I think we all try to accumulate small areas of knowledge within our vast caverns of ignorance... glass is too enormous a subject for most of us to contemplate without some attempt at specialisation and 50's Skrdlovice may indeed be my main focus currently. I am pretty sure David (Langhaugh) has one of these, M. Stahlikova PN 5833/5928, a very nice thing,
Robert (bOBA)