Once upon a time, the Watch Tower Society was a bit more honest (less dishonest) regarding changes made to the literature. For example, regarding the Studies in the Scriptures: Although the books were altered post-1914, the changes to volumes Two and Three are documented in the 01. March 1915 issue of the Watch Tower, Reprints page 5649:
CHANGES IN "SCRIPTURE STUDIES"
We call attention to a few slight changes which have been made in four pages of Vol. II. and six pages of Vol. III., "STUDIES IN THE SCRIPTURES." These are all trivial and do not alter the real sense and lesson, but conform to the facts as we have them today. The pages containing these corrections are as follows:
Vol. II., page 77, line 1, "will be the farthest limit," reads "will see the disintegration."
Vol. II., page 77, line 6, "will obtain full universal control," reads "will begin to assume control."
Vol. II., page 77, lines 16,17, "end of A.D. 1914," reads "end of the overthrow."
Vol. II., page 81, line 9, "can date only from A.D. 1914," reads "could not precede A.D. 1915."
Vol. II., page 170, line 16, "at that time they will all be overturned."*
*How long it will require to accomplish this overturning we are not informed, but have reason to believe the period will be short.
Vol. II., page 221, line 25, "full favor until A.D. 1914," reads "full favor until after 1915."Vol. III., page 94, line 29, "in this end or harvest," reads "at the end of this harvest."
Vol. III., page 126, line 12, "at A.D. 1914," reads "after 1914."
Vol. III., page 133, line 21, "ere the harvest is fully ended."+
+The end of the harvest will probably include the burning of the tares.
Vol. III., page 228, line 11, "some time before 1914," reads "very soon after 1914."Vol. III., page 228, line 15, "just how long before," reads "just how long after."
Vol. III., page 362, line 11, "some time before," reads "some time near."
Vol. III., page 364, line 14, "must not only witness," reads "may not only witness."