Have you ever wanted to dive into the archives of historic Zeppelin pictures? As of today the picture archives of the Federal Archives of Germany are open to the public and can be searched online. The Federal Archive has around 11 million pictures, photographs and posters of the modern German history dating back to the 1860s. The collection consists of pictures from the Weimar Republic (1919-1933), the Nazi Reich(1933-1945), the GDR(1945/49 - 1990) and the Federal Republic of Germany(from 1945/49 onwards). Currently are "just" 60,000 pictures from all time spans available but more pictures will be added continuously. You can search the database by full-text retrieval, extensive search or research by subject, person or locality. So why don't you go a head and do a search for "Zeppelin", "Luftschiff" or "Hindenburg". I am sure there are some gems in there that no very few people have seen before. If you found something great, tell us the Signature of the Picture in the Comments section. For example if you enter "146-2005-0095" in the Search box it should get you to a nice drawing of Graf Zeppelin. So dig through the archives and tell us what you found in the comments.
Bundesarchiv/Federal Archive - Picture database