It is said that the composite character disclaimer was added later, for the second edition. I can’t find the original edition online, anywhere. I can’t even find the entire preface/introduction for the second edition online. As for the original edition, I’d love to know how he referred to his mother in that edition. Most of the time, he calls her “my mother.” In one news article from the 1990s, the writer called her “Ann”. Remember that early on, she was called Shirley, and not Stanley.
It’s said that the book was hardly changed for the second edition, but that cannot be true because of the number of pages. He rewrote the preface and introduction.
First editions cost in the thousands of dollars and they are about as easy to locate as a 1960 Mercer Island High yearbook.