Roy — It seems that it would have been a poor investment, chipped or perfect!
John — Grateful thanks for the links. That's the vase I was offered, and it will be staying that way. Over the years I've made too many mistakes when buying, so this is one less.
Other readers — If you've not visited the links John provided, please do so, as the vase is very convincing labelled up as FT/Dartington.