Thanks both

Kane, good find as I found no glass labelled with the Nasco label on my searches however I'm going to use a different search engine and see what that throws up.
Christine, my thoughts are my vase is definitely not Japanese as if it was I suspect it would have 'Made in Japan' on it. I do think it is older rather than more recent, and I don't think it is Chinese. That said, it's probably because I do have some cased glass that I believe is Chinese and this vase has a much more opaque thicker lining than those pieces and is a much more substantial piece of glass all round. However, I have also recently seen cased glass that I had thought was Chinese (seen quite a few of them around and about suddenly) which does have a thicker white inner lining

plus as John mentioned, he has suddenly noticed these more recently.
My gut instinct when I picked it up was Italian. Then again I often play the guessing game on here just to see if I am learning anything

and find out I was totally wrong

Note to self - next time buy something with a label which says 'made in...' if I want to research it

Thank you to all for your valued input and thoughts. They are much appreciated.
m