I actually just read an amazing article today on this very topic. Found here at: http://www.jwfiles.com/1925-1975.htm
The article shows documented proof that both in 1925 and 1975 the Watchtower Society clearly prophesied falsly about the coming of Armageddon, like the ones below written in 1966 and 1967:
"'What about the year 1975? What is it going to mean, dear friends?' asked Brother Franz. 'Does it mean that Armageddon is going to be finished, with Satan bound, 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. Watchtower 10/15/66 pg.631"
"According to the Bible timetable, man's history on earth has been nearly 6,000 years. Adam was created in 4026 B.C.E., which means that six thousand years of human history end about the fall of 1975 C.E. We are in the great 7,000-year rest day of God, starting at the time he rested after the creation of Adam and Eve. There are, therefore, a thousand years left to run. Without Satan and his demons to disturb mankind it will indeed be a restful time. It will be like a sabbath. Watchtower 7/15/67 pg.446-7"
The most telling except taken from the KM in May of 74:
"Reports are heard of brothers selling their homes and property and planning to finish out the rest of their days in this old system in the pioneer service. Certainly this is a fine way to spend the short time remaining before the wicked world's end.—1 John 2:17Kingdom Ministry May 1974 pg.3"
The crazy thing is that immediately after their own prophecies failed they turned the blame directly onto the followers saying that they were rash and read too much into things.
Crazy is as crazy does...
"Moxie"