Hanna Barbera PREPRINTED signed photo.  Obtained in the mail when I wrote to Cree Summer.  I have no idea why I got this.  Although preprinted, these photos are really cool so I kept them.  Bill Hanna and Joe Barbera were executive producers for Scooby Doo (and inventors of the Scooby Doo series/characters). The animation cel on the right is actually signed by Bill Hanna and Joe Barbera.  Obtained through a reputable animation cel dealer.