Thankyou very much for all your comments, you have been very helpful. What a great website this is!
Sue, I think you may be correct when you say the vase looks fairly recent. I have examined the base more closely and there is very little in the way of age related wear. However it does feel like a quality peice to me, and rather unusual. I'll have to do some research into your Polish theory Sue. Thanks again for all your help.
Kind regards, Janet.