The prior pics are of the original dist(?) in Colin's old 69 Gt350 air 4 speed vert. The assumption(I KNOW, assumption) could be that the pics below are the advance that came on the orig dist sitting in a box that came with the car? Sorry, best I can do right now. Is this an original single advance from 1969? I asked for some stampings on it if they are present. I have never seen a dual advance on an "original" 69 Shelby 4 speed but I have on a few 70s like my car.