Nothing much to beat out, Wolfie. It's been in production since practically the start, without a break.
I have bits with the very early thin sort of loopy-script written Mdina, the style we now know to be Dobson.
You can tell some later bits from the shape,.
The blue stripes had silver chloride applied to them as they were being applied to the body - a technique used inside the cut-ice lollipops, verdala bowls and the early stuff i call "seaweed" so that does take it back to MH.
Some bits have a lot more silver chloride than others, there seem to be about two "lots" of very heavy use, one earlier, (which can give rise to a very ambery sort of lot of colours) and then later, a whole load of very bright stuff started coming out.
The blue is a bit paler, and the sliver chloride stays pale too, the clear stays clear. You'll find flared rim vases and decanters in that style.