In the effort to translate and convert the WITCH design from using Cold Cathode Valves (aka tubes) into modern components, it was essential to understand how each of the valves worked and how they were being used in the system. As someone who grew up in the age of the transistor, I was completely unfamiliar with practical applications of using valves. This is where the engineer in me kicked in. The first order of business was to find datasheets on every component I could identify. The WITCH schematics and maintenance logs had very good details about the model and type of devices being used. I quickly found on the net The Valve Museum. Most of the parts I was looking for were documented there with datasheets and pictures! Now with datasheets in hand, I was able to start working backwards on how exactly these engineers created a working computer from "stone knives and bearskins"!
EDIT: pictures and pdf datasheets are available via the WITCH-E Project github repository under datasheets