Thanks for that bit of research ObjectiveTruth, I was wondering what was being taught in 1925 but was pretty confident that it was something different to what they are teaching today. I think the whole point of mentioning Nathan Knorr was to show that he was obedient to the organization regardless of what they were teaching. He was faithful to the org and it was necessary for him to believe that the teachings at that time were considered to be the truth.
That article reconfirmed their idea regarding the interpretation of the two witnesses and even though the teaching is archaic and doesn't make any sense or have any real relevance to today, they expect the sheep to be obediant and believe that interpretation to be the truth. Worse still, they are also reconfirming that the prophecy of the two witnesses has already been fulfilled.
The article is so badly written that they don't even care to make it easier for the sheepies to understand, it is now all about just accepting as truth whatever they print.