Rattigan350:
607 did not originate with the Watchtower or CT Russell. It started back in the 1820s.
That is only ’accurate’ to the extent that it is entirely mundane. Adventists in the 19th century made stabs at dozens of years with convoluted calculations loosely based on Daniel. There’s scarcely a year of the late 19th and early 20th centuries that some nutty Adventist didn’t claim was ‘marked in scripture’. See also ‘Texas sharpshooter fallacy’.
But you know who never said Jerusalem was destroyed in 607BCE? Russell. He said Jerusalem was destroyed in 606BCE. Because he didn’t know there was no ‘year 0’.