Why did this Early Version of the Watchtower Magazine include Crosses, and what do these other Symbols on the Magazine Represent?

The following is "Zion's Watch Tower and Herald of Christ's Presence, October 1, 1907." I was under the impression that symbols (especially crosses) were not allowed in the church. "Jehovah's Witnesses teach that Jesus was crucified on a stake, and that they reject the cross as a pagan symbol. No crosses are to be displayed in the worship hall, on a person, or in Jehovah's Witnesses' houses" (page 535 of AMG's Encyclopedia of World Religions, Cults, and the Occult). Question: What do the symbols in the top corners represent, and how are these symbols associated with Watchtower?