Magnum 500 wheel center caps

[70 sublime]

I picked up a set of mag 500 wheels with another car a while back
They are the 68 style that the whole rim is chrome so no trim ring

I noticed on one of them the end of the center cap was different
Should they all have this or was this just a part someone picked up to fill the hole ??

First picture is the part in question
Second picture is the center cap off one of the other 68 wheels ( the other 3 wheels all look like this)
Last picture is the center cap from a 70 500 mag wheel that has the trim rings and painted rims

[BLK 68 R/T]

I've not seen any mopar with the first center cap. But I do think it's cool.

[ODZKing]

I believe that is what they used on either Fords or GMs ... Mopar was the bullseye