I asked exactly the same question Steve.
It's an S1 screen. I got a replacement heated one. And windscreen company refused to fit it.
Has your's cracked then Steve? Mine did on the passenger side.
http://www.madabout-kitcars.com/foru...ead.php?t=1916
I also noticed that the windscreen is under a lot of stress trying to bend it, if you try and fit it into the dash groove with rubber at the bottom. I can't remember how it sat without rubber at the bottom.