rally wheel questions

they are all oldies ......last guy said he bought them 30 years ago ...then found out they didn't fit his road runner...
what is with the differnent trim rings....what years were the rallies offered...my 69 had them on it in 82 ...i see them on all a bodys
and i think the caps showen ...my fav style were 72 ? never would have known they had 2 styles of them
were they offered in differnet shades ...on the older ones