Here are the backings.

The DC special parts "Fasson Fas Cal" sticker has a much wider curved printing pattern on the backing than the 1969-1970 stickers I have do.

Also of note is that the "Fasson Fas Cal" stickers I have from 1969-1970; examples would be the "Hustle Stuff", small 1969 silver "Car of the Year", big 1969 door "car of the Year", and "Blooming" appear to be a completely different "Fasson Fas Cal" than this later DC special parts. The earlier "Fasson Fas Cal" stickers I have are all on clear backing.

Also of note is that the "Road Ready" stickers I have are based on a stable (Mix of paper and vinyl?)like the other "Fasson" small stickers, vs. the later "DC special parts" sticker which is all vinyl-and shrinks on the backing paper.