To add more info on this I have narrowed down from research in the Pontiac master parts catalog http://www.teufert.net/partbook/67-76/15-p.pdf that only 4 colors came with the first type non knitted vinyl which they called "grained vinyl fabric". Parchment, Teal, Gold and Turquois. The 3 cars in this thread are early built cars and the latest I have seen is a second week of January Autumn Bronze with Parchment interior.