The name Watchtower was taken to signify what these men who started this organization had something unusual and distinct in Christian theology, a truthful representation of the Gospel of Jesus Christ and his new prophesied Kingdom arrangement.
The magazine C.T.Russell started was "Zions Watchtower & Herald of Christs Presence" in 1879 ?
That also had Masonic symbols on the front cover ,including the cross.
He obviously believed in the Zionist movement of the day and also that Jesus Christ had already returned invisibly back then.
None of which is accepted by the GB of Jehovah`s Witnesses today.