The final KJV text was not established in 1769. While some KJV-only authors have made that claim, it is not true.
While most [not all] of the present varying KJV editions are based on the 1769 Oxford edition of the KJV, their varying KJV texts are not 100% identical to the 1769 Oxford edition text. The editions of the KJV printed in and after 2000 based on the 1873 Cambridge edition of Scrivener did not follow the 1769 text. The present Cambridge editions edited by David Norton also do not follow the 1769 text. The text of the KJV has been revised and changed since 1769.
There are likely more than thirty editions of the KJV in print today that differ in some places from each other. Even editions of the KJV printed by the same publisher today may have some differences. In 2011, Cambridge printed six varying editions of the KJV [the Concord edition, the Pitt Minion edition, the Standard Text or Emerald edition, the Clarion edition, the 2011 Transetto Text edition, and the 2011 edition of the New Cambridge Paragraph Bible edited by David Norton].
There would be as many as 400 differences between the 1769 Oxford edition text and a typical present KJV edition. Examples of some of the actual differences were listed in another thread.
While most Cambridge KJV editions in the 1800's [besides the 1805/1817 Cambridge editions and the 1873 Cambridge edition by Scrivener] were based on the 1769 Oxford edition as revised in the 1800's, the typical 1800's Cambridge KJV text was changed in 1900's Cambridge editions.
If a Cambridge KJV edition printed in 1887 is taken as an example, 1900's Cambridge editions changed the spelling of around 30 proper names as found in the 1769 Oxford edition to the spelling found in the 1873 Cambridge edition of Scrivener. Scrivener went back to the spelling of these proper names in the 1611 instead of the spelling found in the 1769 Oxford.
Another twenty spellings and changes were made to the KJV text as found in this 1887 Cambridge edition.
The 1887 Cambridge in agreement with the 1769 has "travel" at Numbers 20:14 and Lamentations 3:5 while 1900's Cambridge editions have "travail."
The 1887 Cambridge in agreement with the 1769 has "Most High" (Deut. 32:8) while 1900's Cambridge editions have "most High."
At Joshua 19:2, the 1887 Cambridge has "Beersheba, and Sheba" while 1900's Cambridge editions have "Beersheba, or Sheba."
Weren't some versions of the KJV also based upon the 1894 revision TR text though?
Maybe Zondervans was for awhile?