Much better image. I don't know what the seller did with his ones, but they were weird.
However, it might still have been made at Mdina, unless there is something distinctive of MDG manufacturing there, such as an oddly finished-off polishing of the base.
I'm not sure what you mean by "unusual flatting finish".
I'm pleased for you that it's not a bit of contemporary Chinese that just happens to resemble Maltese glass accidentally. I didn't think it would be, but could not be 100% sure.