There is another event that coincides with Jesus becoming King in 1914 that matters too, and unlike Jesus' invisible appointment as King it is a visible event.
It also happens to be the only thing about 1914 that Watchtower says today that it also said in C.T. Russel's time. And that is it's the end of the Gentile Times. That means it's the end, or the farthest limit, of mankind's rulership of itself. Here's how Russell explained it.
"In this chapter we will present the Bible evidence proving that the full end of the times of the Gentiles, i.e., the full end of their lease of dominion, will be reached in A.D. 1914; and that date will see the disintegration of the rule of imperfect men." (The Time Is at Hand, Studies in the Scriptures, Volume 2, 1907 ed., page 76, par 2) -bold emphasis added.
Here we are, 100 years later, and the Nations (Gentiles) have not disintegrated at all, but are still clearly ruling themselves. Unless I'm missing something this visible event, that did not happen, should prove that the coinciding invisible event of Jesus becoming King also did not happen.
1914, and all that Watchtower has said about it, has been a complete failure.