The D-500 was built in 1966 - Durrum closed nearly 20 years ago. The article was written for historical purposes to show the state of technology, computers and medicine thirty years ago. It came from a "What did you do in the war, Grandpa" type of question, so I think the artcle has merit and should be retained.
I was one of the Field Service Engineers working for Durrum, travelling worldwide and installing the D-500, so I am quite familiar with its history and technology. (I still have brochures and tech manuals!)