Hi Lynn,
I really don't know for sure, but these vases share a lot in common with some that were made in China in the 1970s and 1980s.
In answer to your other question, you can't add the 'NEW' tag to your posts. These appear automatically on posts which you haven't read. As soon as there is a new post, the thread will be marked 'NEW' in the index. As soon as you read the thread, the tag will disappear. Don't worry. Other people will still see your thread marked with the 'NEW' tag until they read it.