Apparently the 3rd President Rutherford did become aware and taught Jesus began his rule in 1914 some years after becoming president.There is some evidence that Rutherford first mentioned 1914 as the beginning of christs second coming in the 1930`s.
"Jehovah`s Witnesses Proclaimers of Gods Kingdom" on pages 46 and 47 explains that in 1876 Second Adventist Nelson Barbour succeeded in convincing Charles taze Russell that Christs invisible presence began in 1874. { Apparently 1874 was first taught as the end of 6000 years of mans existence and Jesus return }
Page 133 mentions this again along with a footnote explaining that a clearer understanding of Biblical chronology pointing to 1914 was published in 1943. That footnote refers to the 1943 book "The Truth That Shall make You Free" that changed the date of Jesus return from 1874 to 1943.The Proclaimers book doesn`t mention any date prior to 1943.
Captives of a Concept Chapter 3