Anony Mous:
The date of 607 by the WTBTS is only reached by divining/Kabbalah from 1914 (the tail wagging the dog), and then adapting the rest of the timeline to agree with the preconceived notion that 1914 was the beginning of time.
Russell adopted his chronology from Millerism and made predictions about 1914 many years before that year, though none of what he predicted corresponds to what actually happened in that year. His selection of 606 BCE was based on counting 70 years from 536 BCE when he believed the Jews arrived in Judea. (Various Adventist groups selected dozens of years as the end point of the invented 2,520 years, and Russell wasn’t even the first to guess 1914.) They changed it to 607 BCE in 1943. They don’t say anything at all about 1914 being the ‘beginning of time’.