In my humble opinion, I don't feel that your lovely vase is actually Carnival. To be Carnival Glass, it should be iridised, moulded and with a pattern. Your vase is most likely blown into a mould and is certainly iridised, but it doesn't have a pattern and I believe it also has a pontil mark. If I had to guess where it was made, I'd plump for Bohemia, but that's just a wild guess. Others may be able to give you more info.