Image
link 15 shows a selection of colorful agendas in chronological order 1906 1924 1939 and 1953. Two are in German and two in
link French. The 1924 and 1939 volumes show advertisements on the covers but almost all of these agendas contain ads
link inside. In image 16 the same books are arranged in clockwise order from top left and you can see the advertisements that grace the inside covers.