The Book of Revelation was written before 70AD
Now this is interesting, considering, that Papias and Polycarp, 2 very very very well known Disciples of the Apostle John, did not even meet, John, until mid 80's AD, and are the 2 of the Pastors who take over the 7 Churches, written in Revelation 1 and 2, when John becomes Bishop in 96 AD over Ephesus.
John, doesn't take over the Role of Bishop until after his release from Patmos, by Roman Emperor Trajen [Roman Archives], around 96 AD.
Your dates are impossible, knowing, that Papias, and Polycarp, and Ignatius, and Ireneaus, all confirm this 96 AD date of Release from Patmos.
Even the Papyrus Dating Method, confirms, Book of Revelation was written late 90's AD, because of how the Parchment Paper was made. It was the Newest Method that the Ancient World discovered around 80 AD.