Rutherford can't have written Let God Be True since he died in 1942.
______________
Maybe he was editing the Watchtower from heaven like Russell did :)
" As in the type that date three and a half years after the death of Christ marked the end of all special favor to the Jew and the beginning of favor to the Gentiles, so we recognize A.D. 1881 as marking the close of the special favor to Gentiles-the close of the "high calling," or invitation to the blessings peculiar to this age to become joint-heirs with Christ and partakers of the divine nature." The Time Is At Hand 1916 ed. p.235
Rutherford recycled this concept, and without any Biblical basis moved the sealing of the 144,000 from 1881 to 1931: "God having a fixed time for every purpose (Ecclesiastes 3:1), his time to give creatures on earth the opportunity to get in line for a heavenly reward has been from A .D. 29 until, chiefly, 1931, called the "day of salvation". "Let God be True" 1946 ed. p.298
"Although Jehovah had come to his temple in 1918 and had begun judgment of this anointed class, still others must be brought in, because some were found unworthy and they must be replaced. The evidence (variously) show that this continued until especially 1931 when there began a work of gathering those recognized as "other sheep" of the Lord Jesus Christ." Jehovah's Witnesses In The Divine Purpose 1959 p.139
This was later changed to 1935: "Hence, especially after 1966 it was believed that the heavenly call ceased in 1935." Watchtower 2007 May 1 p.30
"Their being identified in 1935 as the great crowd of the other sheep was an indication that the choosing of the 144,000 was then about complete." Revelation, Its Grand Climax Now at Hand p.125
Myriad changes to dates but the only scripture quoted by Rutherford was Ecclesiastes 3:1: "There is a time for everything and a season for every activity under heaven." Even then, Rutherford claimed the heavenly calling ended in 1931. My parents became Witnesses in the late 1930's and they were told that heaven was full up, so they would have to settle for the earthly hope. But the number claiming to be part of this heavenly group is still increasing! Check out the link below for the official excuse:
"That calling began in 33 C.E. and continued into modern times. After 1935 the thrust of the disciple-making work turned to the gathering in of the great crowd. Some who were baptized after 1935 have had witness borne to them by holy spirit that they have the heavenly hope, so we cannot set a specific date for the end of that calling."
________________
Posted on Yahoo answers 2014
https://answers.yahoo.com/question/index?qid=20140515023031AArdced