Watchtower May 1, 1922 - But in keeping with the Lord’s arrangement he used a man. The man who filled that office, by the Lord’s grace, was Brother Russell. Jesus dearly indicated that during his second presence he would have amongst the church a faithful and wise servant, through whom he would give to the household of faith meat in due season. The evidence is overwhelming concerning the Lord’s second presence, the time of the harvest, and that the office of "that servant” has been filled by Brother Russell.
w14 1/15 - 6 Jesus then used his kingly authority to appoint a “faithful and discreet slave.” This slave would provide a regular supply of wholesome spiritual food to all who make up the “one flock” under Jesus’ care. (Matt. 24:45-47; John 10:16) Since 1919, a small group of anointed brothers have loyally carried out the weighty responsibility to feed the “domestics.”
w17 February - 10 In 1919, three years after Brother Russell’s death, Jesus appointed “the faithful and discreet slave.” For what purpose? To give his domestics “food at the proper time.” (Matt. 24:45) Even in those early years, a small group of anointed brothers who served at headquarters in Brooklyn, New York, prepared and distributed spiritual food to Jesus’ followers.
So, CTR was appointed by Jesus to be the F&DS says the F&DS of 1922 who was appointed the F&DS by Jesus in 1919...
And there were a group a men doing the work of the F&DS before Jesus appointed a group of men in 1919 to be the F&DS.