I think i have another valid arguement to prove 607 wrong...tell me if i am wrong or not.
Read Jeremiah 52:30 - It says in nebuchadnezzar's 23rd Year he exiled the Jews. The Insight book (number two) on page 481 it says his 18th or even his 19th year...So even counting his regnal years or just his accession years that the society say, you don't get 23rd year...