On page 2 of this topic thread Splash lists pages in the Insight volumes about the Babylonian kings. Moments ago I started reading the one about Belsshazzar and I find myself fascinated about what it says. I am astonished that it (on page 283) demonstrates there are archaeological records which are consistent with, and even collaborate, some statements in the book called Daniel. Prior to today I had little interest in reading the Insight volumes (or the Aid to Bible Understanding), even though I obtained the Insight volumes in first year they were published (1988) and even though that prior to that I tried to order the Aid book from the WT (but it had gone out of print by then). In the year 2006 I finally found and purchased a used copy (in very good condition) of the complete Aid book (1971 Edition), thus replacing the 1969 Edition I had since childhood.
I notice that Insight Volume 2 page 457 says that Nabonidus "... ruled some 17 years (556-539 B.C.E.)." It thus explicitly agrees with with what Splash calculated as the first year of the rule of Nabonidus, and thus at point in the chronology the WT agrees with the secular chronology. But when we come to Evil-Merodach the Insight book (Volume 1 page 773) explicitly says that Evil-Merodach began his rule in 581 B.C.E. whereas Splash calculates 563 B.C.E instead, a difference of 18 years (but not 20 years). Thus it appears that some of the difference in the WT's dates from the secular dates is somewhere in between the reigns of Nabonidus and Evil-Merodach. Likewise
Insight Vol 2 p.480 gives a date differing by 18 years form that calculated by Splash, the Insight book says "Nebuchadnezzar ruled as king for 43 years (624-582 B.C.E.) ... " and thus claiming Nebuchadnezzarbegan to rule in the year 624 B.C.E. instead of Splash's calculated date of 606 B.C.E. Does perhaps the WT think that
Neriglissar ruled for about 18 years more than 4 years? Apparently not, since on page three of this topic thread Vanderhoven7 says "Neriglissar ... reigned four years Babylon the Great Has
Fallen - God's Kingdom Rules p.184". I do see that the Babylon Great book (as published in the 1999 Edition of the Watchtower Library does say that which Vanderhoven7 quoted it as saying. Does then the WT think there is an unknown king missing from the extant Babylonian records of their kings?
On page 6 of this topic thread scholar says the following (which I think is interesting).
"By constructing a scheme of Chronology based on the backward computation of the reigns of the N B Period you get 586/587 for the Fall of Jerusalem base dom material in the Insight volumes. I get that!.
However, if using the same methodology by means of counting back using the regnal data- reigns of the Hebrew Monarchy as published in that same volume then you get 607 BCE. Do you get it?"
scholar which pages of the Insight book are you using for the data of the reigns of the Hebrew Monarachy which add up years from 539 (or 537) B.C.E. to get 607 BCE? Are you referring t the chart which is on pages 404-406 of Insight Volume 1? That chart is counting up (forward in time) from what the Insight book says happened in 1117 BCE. I don't see it counting backward in time from the well established date of 539 B.C.E. Therefore please provide us with more information so I and others can see what you are using to support your claim.