Ok, I got the screen out without cracking it so didn't have to cut the rubber.
I thought maybe the rubber surround had been put in mine to help stop leaks but that was not the reason. Reason was someone done a bodge job on the passenger side bottom corner and this would clearly not allow the original chrome surround to be fitted.
Crank mentioned on the Norway Sud thread he remembers reading that a Hillman Avenger screen may fit series 1 Suds. I have been looking into this and have a feeling that this is what could be in mine, or if not the screen itself certainly the rubber surround.
Below is a picture of the rubber surround when still on my S1, it has a plastic insert that runs all the way around. Originally Suds had bonded with all chrome ( Metal ) then rubber with a Chrome insert again metal as far as I know and finally fully rubber surrounds with no insert. I have looked everywhere and can't see one Sud with the rubber and plastic insert I took off my car so have come to the conclusion it is an imposter
and could be an Avenger one, maybe I should ask Purdy
Also a couple of pictures of Avengers. Is it just me are do the surrounds look very similar?
The screen I removed from my Sud measures 25" tall at the centre point and 48 and 1/8" wide at the centre point. I will double check these measurements with a cloth tape later. I am going to take the screen out of my series 3 to compare to this one soon enough.