It may have been for advertising purposes, but the name "International Bible Students Association" was Russell's original name for the Bible Classes (followers of the Watch Tower). And if you advertise yourselves as International Bible Students Association, what name do you suppose people will call you? ZWT April 1, 1910: R4593:page 119:
"INTERNATIONAL BIBLE STUDENTS ASSOCIATION
FOR many years the dear friends who regularly meet all over the world for the study of God's Word, using the WATCH TOWER publications as helping hands, have been perplexed to know how to advertise themselves...Now in the Lord's providence we have thought of a title suitable, we believe, to the Lord's people everywhere, and free from objection, we believe, on every score, the title at the head of this article...In harmony with New York state laws the association will be under the direction and management of the People's Pulpit Association, which, in turn, represent the Watch Tower Bible and Tract Society. To avoid everything that might be construed as "joining," the membership is confined to those constituting the chartered Peoples Pulpit Association. The provision is made that all Bible Student Classes using the Bible Study Helps published by the Watch Tower Bible and Tract Society may consider themselves identified with the association and authorized to use the name "International Bible Students Association" in respect to their meetings."
Associated Bible Students replaced in 1914, for the most part, in advertisements what formally had been International Bible Students Association. Henceforth, if International Bible Students Association was used "local" was to be used ahead of it, reserving International Bible Students for national and international purposes. So, I fail to see why it is incorrect to say that in 1910 the name Russell chose (adopted) for the Bible Classes was International Bible Students Association. You mention Feb. 15, 1915 being officially when the name Associated Bible Students was adopted. ZWT on that date, page 64 still advertises International Bible Students Association Classes. But thanks for pointing to the changes made from International Bible Students to Associated Bible Students. But where do I confirm the OFFICIAL name change?