May we see the base please Steve, it always helps to show both the base and the side view and also the top if it is a vase or jug.... we can help you more when you show us more.
This is, as John says, almost certainly Mdina (again Maltese) but some do have the Mtarfa or even Phoenician on the base, so it is good to see, and will help other new collectors in the future.
Ooops we have passed in the airwaves!!