MacHislopp,
Interesting. Thank you for the research. I'm saving it all. I've added some info from one more WT that you might want wish to add to your research.
All in all, according to the self-apponted "faithful and discreet slave" of the WTS INC. of NY, Jesus returned 3 times. In 1914, again in 1918, and again in 1919. And he is going to come again in the "near future" according to this 1989 Watcthower mag:
4/1/89 Watchtower --Hear What The Spirit Says To The Congregations--
6But these messages to the seven congregations have an even wider application. At Revelation 1:10, John says: "By inspiration I came to be in the Lord’s day." This verse is an important key to unlocking the understanding of Revelation. It indicates that it applies primarily to "the Lord’s day," which began when Jesus became King in 1914. This understanding is confirmed by Jesus’ messages to the seven congregations. In them we find expressions such as these words to Pergamum: "I am coming to you quickly." (Revelation 2:16; 3:3, 11) After 96 C.E., Jesus did not ‘come’ in any significant way until he was enthroned as King in 1914. (Acts 1:9-11) Then, in fulfillment of Malachi 3:1, he ‘came’ again in 1918, when he came to Jehovah’s temple to judge first the household of God. (1 Peter 4:17) He will ‘come’ once more, in the near future, when he "brings vengeance upon those who do not know God and those who do not obey the good news about our Lord Jesus."—2 Thessalonians 1:7, 8; Matthew 24:42-44.
peace,
gwen