Ok, I don't have an older copy of the Reasoning book that still mentions the generation 1914 thing. However, I still have two books that used to be used as 1st and 2nd study books for new recruits. The 1st one is the Live Forever book, or "You Can Live Forever in Paradise on Earth," copyrighted 1982, 1989.
On page 154 paragraph 7 it says:
"Also, the Bible said that all these things would happen upon the generation that was alive in 1914."
Then paragraph 8, same page:
"After drawing attention to the many things that have marked the period from 1914 onward, Jesus said: 'This generation will by no means pass away until all these things [including the end of this system] occur.' (Matthew 24:34, 14) <sic> Which generation did Jesus mean? He meant the generation of people who were living in 1914. Those persons yet remaining of that generation are now very old. However, some of them will still be alive to see the end of this wicked system. So of this we can be certain: Shortly now there will be a sudden end to all wickedness and wicked people at Armageddon."
My comment from re-reading this b.s. is how in the world can healthy-thinking people suck this all in and then later go right along with the WT when they said this is now "old light." This isn't old light, it's plainly and simply darkness. It's like saying white is black and then coming around later and saying white is now green. Grrrr. Why did I accept that "new light" crap for so long?
Anyway, the 2nd book is the Worship book, or fully "United in Worship of the Only True God," copyrighted 1983.
In paragraph 1, page 176, after mentioning 1914 and establishing this date as the beginning of Christ's invisible presence, the text goes on.
From paragraph 2, pages 176-7:
"The Scriptures clearly show that the 'generation' that saw the beginning of Christ's presence would also see the 'great day of Jehovah' in which he executes judgment against all who practice unrighteousness. (Matt. 24:34; Zeph. 1:14-2:3) That 'generation' is now well along in years. But the Bible does not pinpoint the exact date when Jesus Christ will come as Jehovah's executioner against Satan's earthly system of things."
I don't have a working copy of the CD-Rom yet, so I had to dig through my old library. It's better to have a hard copy anyway because the Society can't come and change the wording like they can, if they want to, with each new edition of the CD-Rom.