67 to 69 Barracuda Jacks

A56 said
more like this one that you posted. View attachment 1715821159 Notice vertical rows of "buttons"?

Okay I get it, but why are they in 67 to 69 Barracudas. I have 30 of them. I have only parted out one 64 Barracuda.and 25 of the other style