That 80907 is part of the bar code for this unopened set of 30 postcards, 30 stubs, and 1600 small stickers.  By now you probably know that Doraemon is a male robotic earless cat that travels back in time from the 22nd century to aid a preteen boy named Nobita Nobi.  As we lurch towards the 22nd century ourselves, someone will need to change the backstory eventually.  Grade: 1