Hi there,
In terms of its shape, it’s a pretty normal shape for Mdina, they often had many shaped vases but I’ve seen this shape a fair number of times. The pattern is often referred to as ‘chevron’ but this is incorrect, it’s actual name is the ‘Roman’ pattern I only know because Joseph said and Olivia Said (head of production and his daughter) referred to it this way when I had fish vases made in this same pattern. Not early sadly, it’s hard to date as they still produce pieces with this same pattern today, my guess is is that its within the last 30 years or so but I wouldn’t like to say for certain, but definitely post 80’s and likely 90’s 00’s but someone else may be able to better tell you.
Well made though and lovely colours on the vase, it’s a good clean example!