The story of that pic is very interesting and rather adventurous :-) Louise is from the former DDR, and as she was a big fan of our Hans even back then, she wanted to have some pics of him. At that time, it was very hard to get hold of posters and so on of "Western" stars, so she decided to draw them herself, so she could put Hans up on her wall.
She was even once caught with the pic at school and was almost kicked out because of it!! She later managed to forward it to Hans via her aunts and he signed it for her - which explains why the autograph is there (it's real!!).
You can contact Louise at her boyfriend's uni e-mail addie: che91crw@studserv.uni-leipzig.de