Thank you for the additional info, John. Much appreciated. Interesting to hear the button rim was not as ubiquitous on these pieces as I thought. A later date fits too, as Sue said, it is very neatly finished. Presumably after 72 they would have had a wider, flattened rim?
The neck also reminded me of the textured bottle vases ( I guess we're all glass needs on here) just slightly tapered out, whereas the textured glass seem to be slightly tapered in.
I had a beautiful large amethyst bottle, but I sold it. My wife was not a fan.
Thankfully she likes the Japanese vase.