Justice League of America Tattoo Gum Machine Display. These were inserts to display in the front of bubble gum machines in 1970. They were never sold to the public. Have tape on the back of them, so they may have been taped to a machine or displayed. Part of a warehouse find. 100% Original. A rare item to come across as most were throw away when the gum ran out and a new item replaced it. A great display piece for your collection.