I now have confirmation of the accuracy of the following which I said in my prior post. "But at one time I saw (and I think I once owned) a 1950 edition which
did not have that content about 1 John 5:7, 8 in the Appendix. I thus
think there were two 1950 editions." Note that by that I mean two editions (the latter being a minor revision of the original First Edition, and that that revision of the First Edition did not likely state itself as a revision) before the edition of 1950 which states itself as the "Second Edition". The confirmation is as follows.
The WT Library CD-ROM of 1999 says the following in the November 15, 1950 issue of the WT in the section called "Addenda On 1 John 5:7, 8".
'CUT THIS OUT AND PASTE IT
in your copy of the New World Translation of the Christian Greek Scriptures in the blank space on page 786:
ADDENDA ON 1JOHN 5:7, 8:
Since release of the New World Translation on August 2, 1950, at the international assembly of Jehovah's witnesses at Yankee Stadium, New York city, there has been widely published religious criticism over its rendering of 1 John 5:7, 8. Therefore we append the following as a suitable footnote to those verses appearing on page 700:
1 John 5:7, 8: "For there are three witness bearers, the spirit and the water and the blood, and the three are in agreement."
This rendering is according to the Greek texts by Westcott and Hort (1881) and by D. Eberhard Nestle (18th edition of 1948) and by José María Bover, S.J. (1943) and by Augustinus Merk, S.J. (6th edition of 1948).
After "witness bearers" the cursive Manuscripts No. 61 (of 15th or 16th century) and No. 629 (in Latin and Greek, of 14th to 15th century) and Vg C.S add the words: "In heaven, the Father, the Word and the holy spirit; and these three are one. 8 And there are three witness bearers on earth." But these words are omitted by ... MSS. and the Latin New Testament according to the edition of St. Jerome, by Wordsworth and White, edition of 1911.'
[My quote includes "..." because I was unable to copy and paste certain characters of the source onto this website.]
dropoffyourkeylee, does your copy of the First Edition include content about 1 John 5:7, 8 on page 786? If it does then it is not the original edition of the First Edition, but an revision/edit of it (in which your copy does not declare itself to be a revision/edit).