Did you know that it was 1920 (and possibly as early as 1918) when the WTB&TS, Inc. initially began to track and keep extensive field service activity records?
That’s what’s noted in the footnote found on page 312 in their “history” book, Jehovah’s Witnesses in the Divine Purpose.
On pages 312-313 they even included several charts – including one that took up two pages titled “Yearly Reports of International Preaching Activity” that started with 1928 as the first official service year reported. (see below)
Apparently there must have been other ways the Watch Tower Society kept records even before 1928. For example, the January 1, 1950 Watchtower magazine reported on page 11:
“In 1918 there were only 3,869 persons announcing the King and the Kingdom in all the world.”
- Watchtower Service Reports from 1928-1958 [click to view]