Here's one - In the 8/15/1993 Watchtower, page 9, in the article " Why You Need to Attend Christian Meetings", the Watchtower made the following statement:
" Jehovah's Witnesses have consistently shown from the Scriptures that the year 1914 marked the beginning of this world's time of the end and that "the day of judgment and of destruction of the ungodly men" has drawn near."
An examination of older Watchtower publications shows that Jehovah's Witnesses (or Bible Students as they were previously known) did have NOT "consistently shown from the Scriptures that the year 1914 marked the beginning of this world's time of the end..." Rather, the Watchtower pointed to another date for the beginning of the "time of the end."
In the "Finished Mystery" book, on page 239, the WTS says:
"This is without question a fulfilment of the prophecy testifying to the "time of the end." These physical facts can not be disputed and are sufficient to convince any reasonable mind that we have been in the "time of the end" since 1799."
Also, from the March 1, 1922 Watch Tower:
" The indisputable facts, therefore, show that the "time of the end" began in 1799; that the Lord's second presence began in 1874."
The book "Creation," published by the WTS in 1927 has a very detailed explanation as to why they felt 1799 was the beginning of the time of the end. Here are a few quotes.
Creation
, page 293:
"Napoleon began this Egyptian campaign in 1798, finished it, and then returned t.o France on October 1, 1799. The campaign is briefly, yet graphically, described in the prophecy, verses 40-44; and its being completed in 1799 marks, according to the prophet’s own words, the beginning of "the time of the end".
Creation,
page 294
"Twelve hundred and sixty years from 539 A. D. brings us to 1799, which is another proof that 1799 definitely marks the beginning of "the time of the end ".
Creation
, page 295
From shortly after 1799, the date of the beginning of "the time of the end", we should expect to find an increase of knowledge, particularly with reference to the Bible.
Going back just a few years to 1921, in the book "The Harp of God" says on page 236:
"The time of the end" embraces a period from 1799 A.D., as above indicated, to the time of the complete overthrow of Satan's empire and the establishment of the kingdom of the Messiah. The time of the Lord's second presence dates from 1874, as above stated. The latter period is within the first named, of course, and in the latter part of the period known as "the time of the end."
I can't believe that anyone who was writing for the Watchtower on 1993 was ignorant of the previous teaching.