I actually saw some Black Jack Gum at a store the other day, no idea if it is like the original or not.
I saw blackjack, Beemans, juicy fruit, not long ago!
Internet I was reading said some company bought the rights to the name in 20-18 or some such and started making it again. Didn't look deeply into it to see if they bought the recipe too.
Last had some Black Jack probably a half dozen years ago...........tasted close enough to bring back memories.
Geno