I have the same non perforated deluxe/custom seat covers in my 68 vert, all original except the alternator. It was built the 5th week of sept 67. I have also seen mention of this somewhere on this site a couple of years ago being verified by a couple of other verified original cars. As a side note my interior is the same color as the op Teal, might be a coincidence or possibly a clue. have to have more people chime in to find out.