Yep, this is from the range known as 'Earthtones', which was released after Michael Harris left Mdina. Interestingly, as some of you may know, when he arrived at IOW he -- independently -- released the very similar looking 'Tortoiseshell' range at roughly the same time. This just goes to show again that quite often it isn't always a case of one person copying another over a design - it just happens as it represents the 'look' of the time, is the logical next step etc or whatever - sometimes people just have the same ideas as another, with neither knowing about the other.
Anyhow. Mdina Earthtones is slightly different in terms of colour and the form of the random pattern. Compare them and you will see what I mean - Earthones tends to be more swirly, for example, due to the way it is made compared to IOW T'shell. Earthtones is also generally blown much thicker than IOW T'shell, giving pieces more weight. Earthtone pieces have flat bases and IOW T'Shell pieces are typically marked with a concave 'coachbolt' (rare) pontil mark or a 'flame' (more common) pontil mark.
Earthones was produced for quite some time from the mid-1970s and may even be still in production, along with all the new ranges released by Mdina. It's not hard to find, but this is a nicely proportioned and coloured piece. Paper labels are earlier than clear plastic, which I'd think date from the 1990 onwards. I don't have an exact date as it's a little beyond my scope time-wise.
I don't know why Michael Harris is not mentioned on the Mdina Glass website. I have my thoughts and opinions (
) , and I guess that Mr Said has the right to decide what to say on his own website, but I think he should be mentioned. History can't be changed whatever (huge) credit one deserves for successfully running an independent art glass studio in difficult times over a number of decades.
Hope this helps,