Hi Udo and others. I imagine that these are quite valuable. I have never seen them before. My problem is that I don’t know how to read them. The straight arrows are obvious. Some of the bent arrows leave me wondering. You have the shafts of some of these arrows with one to three short vertical lines. I am uncertain what these represent. This confusion is compounded when in some of the illustrations you have a partial second line running parallel to the shaft of the arrows.
I would think a brief explanation would correct the confusion.
Be well, Ron