Having been pointed in the right direction by Ivo (many thanks) we hit our Hathe Cantze Loetz book and found the distinctive stretched top is identical to the one shown as vase 246. The strange thing is we have had a lot of Loetz through our hands but the article and then the "expert" opinion threw us from the obvious. Now if anyone would care to give us an opinion, the same top is shown as Vase 123 as being designed by Robert Holubetz, and being quite rare. Would anyone venture an opinion as to whether it is designed by Holubetz or by Prutscher or someone else, and possible value. BTW we have a Prutscher chandelier in our home with white moulded shades, are they likely Loetz?