General Forum

I live in Canada and the 1964 baseball cards I bought in packs had made and distributed in Canada by o-pee-chee on them. On the backs of these cards it had topps  made in USA printed on it.However the backs of the cards are a lighter orange in colour as can be seen on the 1964 number eight card in the gallery listed on this site.Also opc  did not make baseball cards until 1965. Almost all the cards I’ve seen and purchased have a darker orange coloured back. Is it possible the lighter orange are actually opc. Even though it has topps  on them ?  Has anyone else noticed the two different coloured packs?