It wasn't as easily derailed when they first made the claim. Remember, the seven times is prophecy that was originally used to support 1914 as the year for the DESTRUCTION of this system, which understanding makes much more sense in light of the context and what the JWs claim the objects represent. At the end of the seven times Nebuchadnezzar's kingdom did not become God's, nor was his kingship ended.
So to whom do we liken Nebuchadnezzar in his role restored to the throne at the end of the seven times? Well, who supposedly ascended the throne in 1914? The problem isn't with 607 B.C.E. at all. In fact, the WTS likely prays that we will continue distracted by that comparative trifle. The problem is the unfounded interpretation of the prohecy that caused them to need 607 B.C.E. as the year Jeruslame was destroyed.
Interesting.
OldSoul