John Berg signed photo.  Obtained through a friend who got it in person for me. Mr. Berg was an extra (Duros) in the Cantina scene Star Wars: Episode IV: A New Hope as well as doing stop motion animation.  He worked on Star Wars: Episode V: The Empire Strikes Back doing stop motion as well and Star Wars: Episode IV: Return of the Jedi as creature consultant. For Star Wars Episode III: Revenge of the Sith, he returned as model maker and way back, he worked on The Ewok Adventure, aka Caravan of Courage doing special effects.