I posted this awhile ago and I still contend that other posters are better equipped to discuss this subject.
Daniel 5:26 is discussing the destruction of Babylon:
(Daniel 5:26) 26 "This is the interpretation of the word: ME´NE, God has numbered [the days of] your kingdom and has finished it.
In the NWT (w/ references) Daniel 5:26 has a referene to Jeremiah 25:12 which states:
(Jeremiah 25:12) 12 "‘And it must occur that when seventy years have been fulfilled I shall call to account against the king of and against that nation ,’ is the utterance of Jehovah, ‘their error, even against the land of the Chal·de´ans, and I will make it desolate wastes to time indefinite . . .
Clearly then, the WTS is teaching us that the 70 years relates to . To further show this I have put up a quote from the Isaiah's Prophecy book. The society has added this information to sound the teaching down; you know repetition for emphasis.
*** ip-1 chap. 19 p. 253 Jehovah Profanes the Pride of Tyre ***True, the island-city of Tyre is not subject to Babylon for a full 70 years , since the Babylonian Empire falls in 539 B.C.E. Evidently, the 70 years represents the period of Babylonia’s greatest domination —when the Babylonian royal dynasty boasts of having lifted its throne even above "the stars of God." (Isaiah 14:13) Different nations come under that domination at different times. But at the end of 70 years, that domination will crumble . What will then happen to ?
The section above this line is a quick and dirty 607 argument. If you want you can use the information below as well: (good luck)
The only thing left then is to figure out why the WTS says the 70 years ends in 537BCE and not 539BCE?
You could say that this 70 years, Babylon's 70 years of ascension is separate from Israel's 70 years of servitude, but then 2 Chronicles wouldn't make sense because it too references back to Jeremiah 25:12.
(2 Chronicles 36:20-21) 20 Furthermore, he carried off those remaining from the sword captive to Babylon, and they came to be servants to him and his sons until the royalty of Persia began to reign; 21 to fulfill Jehovah’s word by the mouth of Jeremiah , until the land had paid off its sabbaths. All the days of lying desolated it kept sabbath, to fulfill seventy years.
So there you have it. Each scripture clearly cross-references the others (use NWT with references) and the Isaiah Prophecy I book clearly sets forth the Society’s viewpoint that different nations came under ’s rule at different stages.
I’m no teacher and this issue isn’t my specialty but that’s my input .