I'm thinking about early 80's, just after the large prizes...most likely a holographic picture, tatto or game. That's around the time the prize became flat. I collected these for a while. Oh the memories of being a snotty nosed brat begging my dad for Cracker Jacks just to get the prize out and toss most of the popcorn treat. Lol!
It does appear to be a flatter type of prize, and not the little plastic cham variety. The memories are the best, although I actually ate the popcorn :-) Thanks for the info., and sharing your memories. You made me smile. I fanned you!