Look at this car carefully. Especially where the rear edges of the glass panels go.
It appears to not have the ~2" black trim pieces between the rear roof section and the glass panels. Instead, it appears that the glass panels extend all the way to the rear roof section.
If this is true, and I'm not hallucinating, it's exactly the second Fiero I've ever seen with this particular T-top configuration. The first one was an olive green (obviously repainted) 88 GT that was for sale, here, several years ago.
