Adams sour gum (Old Man Adams makes the sourest gum around!) was very popular in the mid to late sixties. I especially liked the sour orange – besides being very sour, it had a nice orange flavor. Unhappily, when the adams brands were sold to Warner-Lambert, they closed the original factories in Long Island City NY, moved everything to Jersey, and stopped making a lot of the flavors and brands.
While they occasionally bring back "Beeman’s", "BlackJack", "Clove", "Teaberry", they do NOT bring back the great cinnamon gum, nor the sour gums. I’ve looked for them for years, and all of the "specialty sites" like Hometown Favorites, and Old Time Candy have told me that Warner-Lambert no longer makes it. Even though, they are bringing back some of the "old" trademarks (like the Adams name on some products).