I remember those days , I believe " Life Everlasting in The Freedom Of God" was the publication that pinpointed 1975 as the end of 6000 years of human history , and an appropiate time for the 1000 years of Jesus Christ to begin his rulership .
[first time they predicted the end of 6000 years was to have occurred in the late 1800`s according to C.T.Russell.]
It was also a time when "special " tracts were to be delivered to every householder , not to spend time at the doors just place these " special" tracts with every house.
The speculation was , their were to be delivered 7 tracts over 7 years that would bring denunciation on religion and Govt. culminating in widespread persecution until Jehovah stepped in at Armageddon .
Their was a sense of urgency and expectation from about 1969 through to about 1976-7
When of course no such thing happened many fell away , but not yours truly dumbass that I was .
smiddy