Feb 15, 1927, QFR - States that the "generation" mentioned at Matthew 24:34 are the "new creation" (the anointed). There will still be anointed on earth when the end comes.
Various 50's and 60's WT's and Asleep! articles detail that the "generation" are the peoples who witnessed the events of 1914. No symbolic meaning implied at all.
Nov 1, 1995 - Unlinked the "generation" from 1914. The "generation" now meant the wicked people on earth who failed to mend their ways and become JW's. This contradicts an article in 1962 that explicitly stated that the "generation" could not possibly mean only wicked people.
Feb 15, 2008 - The "generation" now means the same thing that it meant in 1927. This teaching contradicts the same 1962 article mentioned above. In 1962 it was stated that the "generation" could not mean the "anointed" exclusively.