lol, I have asked that as well. also with the 1985 pointed 5's. That is until I found one, then its like, oh I get it now. I believe the last photo you have a pointed 5.
look at the down bar, on the pointed 5's they are all angled, on the blunter (but still pointy) ones the down bar is flat across.

look at the down bar, on the pointed 5's they are all angled, on the blunter (but still pointy) ones the down bar is flat across.





















