From the June 15, 1938 Watchtower, p. 185: "In the beginning of the first Hebrew month The Watchtower of March 1, 1925 published the article "The Birth of The Nation," meaning that the kingdom had begun to function. An editorial committee, humanly provided for, then was supposed to control the publication of the Watchtower, and the majority of that committee strenuously objected to the publication of that article "The Birth of The Nation," but, by the Lord's grace it was published and that really marked the beginning of the end of the editorial committee, indicating that the Lord himself is running his organization."
There was no Governing Body, Judge Rutherford was the Watchtower president making the decisions and running the organization.