I have an unsigned Mdina vase in this shape. I think it may be unsigned as there is a burst bubble on the side but I do not know this factory very well.... John "Glassobsessed" kindly helped me identify this one, as a variant on Tortoiseshell probably 1970-1980 ish .... It is great that Mdina messed (and messes) around with colours in the same pattern so much, it creates totally different products, with just minor changes.
Robert