Long before. KJVOism had its beginnings in 1865 with the publication of the new American version by the Sunday School board, and gained strength in 1881 with the publication of the English Revised Version. It reached fever pitch in 1901 with the publication of the American Standard Version.
W. B. Riley stated in his book "The Menace of Modernism" (New York: Christian Alliance, 1917), the Modernist believes the Bible's "inspiration exists only in its ability to inspire...its interpretation is a matter of mental conscience." Dr. Riley goes on to say there were a group of men whom he describes as the "old conception," who believed the King James Bible was inerrant. He states on page 11, "On this point we are inclined to think that, even unto comparatively recent years, such a theory has been entertained." He then ascribes this belief to ignorance, and says, "I think it would be accepted without fear of successful controversy that such fogies in Biblical knowledge are few, and their funerals are nigh at hand."
In Riley's day a group of men still existed who believed, "(1) the Bible was finished in heaven and handed down, (2) the King James Version was absolutely inerrant, and (3) its literal acceptance was alone correct." (Page nine of Riley's book as quoted by Dr. George W. Dollar in his book "History of Fundamentalism in America", Page 114).
The constant references to Wilkinson as the father of KJVOism is an example of the logical fallacy of poisoning the well in an attempt to link KJVOism with the 7th Day Adventist cult. However, this is our own Baptist home-grown heresy and we can't pawn it off on anyone else.
We Baptists broke it and we Baptists will have to fix it.