See attached for cover of this publication
Hans,
I believe you grabbed the wrong cover page, it shows the "Survey of Standard Parts (DIN)" and not the "Schlüsselliste".
The attachment below shows a "Survey List"with DIN 88 as an example, that is, in the Survey book a picture of each DIN part is shown, what is was made off, and the finish.
However, to identify the dimensions and finish of a part in the Spare Parts List (
https://www.sl113.org/wiki/Documents/SparePartsList) one needs a "Schlüsselliste" = "conversion list". Those are almost as rare as a hen's tooth. In addition there were several! The attachment shows Schlüsseliste Nr. 7.
The conversion lists do show up on eBay about every two years, so keep your eyes peeled!
(I have added the picture to the technical manual)