HERE JUST A FEW YEARS AGO I HAD TO CALL THE 3M COMPANY ON THE CROOKS HERE ON EBAY TO SHOW PPL THE BACKING ON THESE STICKERS AND I POSTED THE TIMELINE FOR EVERYONE TO SCREENSHOT AND SAVE SO THAT YOU COULD SPOT THE CROOKS OR THE ONE'S THAT ARE JUST STUPID AND DON'T KNOW ANY BETTER, IF THE BACKING ON A STICKER HAS BLACK INK IT IS NOT A 1970'S STICKER, IT MUST BE RED INK OR BLUE INK, IF IT IS BLACK ITS 1980'S THAT TIMELINE CAME FROM THE COMPANY THAT MADE THE BACKING FOR MOST OF THE OLDER JOY STICKERS.