Marc i would stick with the Smiths , i used Scott goggles ever since the 70s until a couple of years ago. Somwhere along the track scott goggles became 3rd rate shit . I was too brand blind (no pun intended )to see it
the modern version just falls to bits after a couple of washes , the foam splits and the glue comes unstuck
I finally bought a pair of Oakleys and a pair of Smiths and on both counts after a couple of seasons and loads of washes there as good as the day i bought them. I would have gone through probably half a dozen pairs of Scotts in the same period and that would have involved glueing them back together until i got pissed off and binned them
Back to your original question i think the mask fits 83, and 89 models , i have a box full of redundant original and later venturi scott mask
I will one day try to marry them upto the Oakleys or Smiths . I have not had much call for the mask as when i changed goggle brands i also moved into a full face helmet