1966 - I guess this would be for Sunday 5/6 countdown day event.
1966 Fredrick Franz is quoted with saying the following statement.
"Does it mean that God's rest day began in 4026? It could have. The ... book does not say it did not ... You can accept it or reject it ... Does it mean that Armageddon is going to be finished ... by 1975? It could! It could! All things are possible with God. Does it mean that Babylon the Great is going to go down by 1975? It could ... But we are not saying."
This was F. Franz's uncertainty clause about the end happening in 1975. He was the vise president of the WT at the time. He should have said that there will be no talks allowed by anyone supporting that the end would come in 1975.
Psalms 146:3 - Do not put your trust in princes or in humans, to whom no salvation belongs.
I think the GB and FDS believe they are princes. Then Psalms 146:3 applies to them.