This, coupled with verse 9 of the first chapter, has led many to set the later date as the date for the Revelation, but in fact, Irenaeus made another statement in another chronicle, that seems to point to an earlier date. He wrote; "As these things are so, and his number  is found in all the approved and ancient copies."
' And to the angel of the church in Thyatira write, ‘These things says the Son of God, who has eyes like a flame of fire, and His feet like fine brass: 'I know your works, love, service, faith,[b] and your patience; and as for your works, the last are more than the first.'
Jesus' greeting to the church in Thyatira, traditionally known as 'the corrupt church', very nearly echoes His greeting to the church in Ephesus. He almost seems to commend this church because their 'last works are more than the first'. Jesus' problem with the Ephesian church was that they had left their first love: as we go further into this letter, we'll see that even though the church in Thyatira is to be commended for their 'works' increasing; they are also reprimanded for a similar problem, they had forgotten what it was all about, in their zeal to increase their works, they had forgotten the basis of those works! It sounds like the 'Christians' in Thyatira had 'started well', but had almost, if not altogether, forgotten that it is not our works which justify us in the sight of God, but rather the work that Christ did in His life and death.