"The Scriptural proof is that the second presence of the Lord Jesus Christ began in 1874 A.D.
--the book, PROPHECY p.65 (1929)
"The date of the close of that 'battle' is definitely marked in Scripture as October, 1914. It is already in progress, its beginning dating from October, 1874."
--Watchtower 1/15/1892, p.1355
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"In the year 1943 the Watch Tower Bible and Tract Society published the book "The Truth Shall Make You Free." In its chapter 11, entitled "The Count of the Time," it did away with the insertion of 100 years into the period of the Judges and went according to the oldest and most authentic reading of Acts 13:20, and accepted the spell-out numbers of the Hebrew Scriptures. This moved forward the end of six thousand years of man's existence into the decade of the 1970's. Naturally this did away with the year 1874 C.E. as the date of return of the Lord Jesus Christ and the beginning of his invisible presence or parousia."
--God's Kingdom of a Thousand Years p.209, para.55 (Frederick Franz) (1973)
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And, some pyramidology thrown in for good measure:
"...this measurement is 3416 inches, symbolizing 3416 years.... This calculation shows A.D. 1874 as marking the beginning of the period of trouble...." (Russell, Studies in the Scriptures: Thy Kingdom Come, Series III, p. 342, 1897 edition [1916 edition changed to read: "We find it to be 3457 inches, symbolizing 3457 years.... Thus the Pyramid witnesses that the close of 1914 will be the beginning of the time of trouble...."] note: the measurement was the length of an interior passageway discovered inside the Pyramids. It has no reference in Scripture.)
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But please keep this important point in mind with these flip-flops and doctrinal changes:
"At times explanations given by Jehovah’s visible organization have shown adjustments, seemingly to previous points of view. But this has not actually been the case." —The Watchtower, December 1, 1981, p. 27