OK, this one is a mystery to me. I ran across this ad in the comics section of the St. Joseph News Press (MO) from 1979. I've never heard of or seen an actual package of this mysterious candy/gum of the past.
Crunchy Candy Outside - Chewy Gum inside!
So I'm posting this in hopes someone can help me get some more info on it. Someone out there must remember this from their youth, right?