I could easily be wrong.

I have several hundred different Mopar stickers from the 1960's and 1970's.

Without talking about bumper stickers, or larger stickers.

Most of the Dodge smaller stickers I have seen have either "Prentice Products" printed or nothing on the backing paper.

For the most part the smaller Plymouth stickers I have seen have "Mactac", "Fasson" or a curved pattern (Sometimes with a R-135) on the backing paper. By the mid 1970's all the Mopar I have seen have had no printing on the backs, except the "Fasson Fas Cal" DC special parts I attached.

I am very happy to learn more.