Pim van der Zwaan is a dutch double bassist and photographer who extensively works with the double bass. At his website and Flickr, he shows some of his photos which mostly have been taken at the workshop of luthier Harry Jansen. Some of his photos are available as a book: “The Art of double bass making“.
Harry and Pim are currently  are working on a new book about the old school of English doublebass making , with photos of basses from John Lott, Panormo, Fendt and other amazing basses.