1968 Topps Hank Aaron back colors
 

Just got my '68 Hank Aaron Topps Milton Bradley #110 in and decided to show the back color compared to others. Picture below - '68 OPC (top left), '68 Topps (top right), '68 Topps MB (bottom left), and '68 Venezuelan (bottom right). There really is quite a difference in the yellow back of the MB. I think the difference will show up better when I get it crossed over to a SGC holder.

got all 4 versions knocked out. I've got all the ryans done in the same way!

1968
 

Even the regular Topps set backs vary some by series. Some of the higher series backs are virtually the same as the MB backs, which is why sometimes you will see misinformed or less than honest sellers offering them as MB cards.