Only because I do occasionally look at the picture captions, do I know this might be loosely called a copy of a Flygsfors Paul Kedelv 'Cocquille' vase (which apparently means 'shell like'). I say possibly, because this one seems to be a little over the top - with frills - when compared with the the more simple lines of those in the books. About 235mm tall, and there is a fair amount of wear on the flat base, so it wasn't made that recently. An attractive cintrine colour - and needless to say not marked. I hadn't realized that the term 'Cocquille' was in fact given to a series of his designs, the common factor being that they were free form, and usually with a white base cased in colour and then cased again in a heavy crystal.
Might this be a 'generic' Murano offering? Grateful for anyone's thoughts,and thanks for looking.