From Internet Archive:
"Time in Which We Are Now Interested," lecture given by Frederick W. Franz on February 5, 1975 at the Los Angeles Sports Arena in Los Angeles, California. This was a special lecture given by Fred Franz (then Vice President of the Watchtower Society and one of the main theologians of Jehovah's Witnesses at that time) on the 6,000 year chronology that pointed to the year 1975 as a special year marked in Bible prophecy. At 50:50 minutes, Franz explains that the expected events for 1975 would be delayed by the "interval of time" between Adam and Eve's creation as the start of the "Seventh Creative Day" did not begin until after Eve was created. The lecture was attended by leaders ("servant bodies") of local congregations in the Los Angeles area and was tied to by wire to another site in Oakland, California. In 1977, Fred Franz became President of the Watchtower Society.
Lecture can be listened to here: