[John Brown]

Maybe most of them were, but I bought a set of them in late 67 or early 68 that were odd balls in that case. These were 15x4 with a standard Chevy 4 3/4 bolt circle and they took different caps than the ones on my 62 Bel Air. As I recall, there were no caps in the box when I got them got them and it was a pita finding the right one.