What year had the big diamond pattern?

Sounds like a Monte Carlo seat cover or maybe a B-O-P.

Aha! I found a pic of what I'm asking about. Lower right pic on the bucket seat.

http://seattle.craigslist.org/oly/pts/1408842878.html

What's a B-O-P btw?

I believe that pattern is not a factory offering for any 69-72 Chevrolet product.

B-O-P stands for Buick - Olds - Pontiac. Some of the Cutlass models (perhaps 71 or 72?) had a diamond pattern for the vinyl seats, but I'm not sure if that's what is pictured in the CL ad.

Man.....you have a 69 SS vert too? What's with you guys?

Okay, jealousy aside, what color and HP is yours? Any Pics? :)

Thanks for the info on the seat pattern BTW!