I'm guessing this is either Victorian or Edwardian, and that it is a bottle rather than a vase but will more than happily be corrected.
If it is a bottle, then its a big one measuring approx. 10.5" high. Unfortunately there was no stopper or lid with it, so I'm not too sure what might have sat on the rim of the neck.
The base is pushed in where the pontil mark is. Some nice enamel detail on one side and plain at the other. Slightly internally ribbed. I just spotted this shopping this morning, and for only 50p!!!

Any ideas what it might have been used for? It would be too costly to contain perfume because of its size, so may be it was some kind of decanter?