http://www.mostholyfaith.com/bible/Reprints/Z1879JUL.asp
The first issue of the Watchtower was July 1879, about 135 years ago. It is interesting to skim the first issue, as well as the letter that Russell sent out to the readers of the previous magazine he was involved with, The Herald of the Morning.
As to the split between Russell and Barbour, while the issue over the ransom seems a contributing factor, the first concern in Russell’s letter is a monetary dispute.
The early issues of the Watchtower were open to many viewpoints. In fact, there is an article in the first issue that could be classified as pro-Trinitarian!