This is one of my oldest Wacky Package stickers. Part of the first series, it came out in 1972.
Ironically, Bazooka bubble gum is a Topps product. It first came out shortly after WWII. The little comics, featuring Bazooka Joe, came out in the 50s. I couldn't find out when they introduced sugarless gum-- pre 1972 obviously. Now it is called "sugar free."
Enjoy your day!