Hello Petar, hope you are well.
Here is a photo of a weapons rack in Iwama, it is from "Traditional Aikido Vol. 4" by Saito Morihiro Sensei which was published in October 1974. The original is split over two pages and I "glued" them together.
Hope this helps.
if is not problem for you to send me this pic, in bigger resolution, on my mail.