I just picked up an 88'SS that I will be parting out soon, very rusty. I did notice the t-top glass has this stamping on it, same for both sides. This is an original CC1/t-top car and the car is mostly original so while I assume these are too, not sure. My 87' and I think other glass that I've noticed doesn't have this stamp but then again I don't check them all, just caught my eye. I thought I'd see if others with t-tops have this PPG solarcool stamp or something different, maybe it was for later 87's or 88's only, or replacement glass? Or many are and I just never paid attention.
383 CCC QJet- BRF 2004r-8.5" 3.42 -313/344@RW - 13.35 @103
350 MAF/SD TPI- CRF2004r-7.5" 3.42 -248/340@RW - 14.55 @ 96
Stockish daily driver