The first edition BOOK OF MORMON has a unique characteristic--a "diamond-shaped" imprint on the title page.  This appears to have happened at some stage during the bookbinding process at the E. B. Grandin press in Palmyra, New York.  The indention made by this imprint is so strong that it often passes through the first hundred or so pages the book.   This "diamond" shape varies slightly in size, shape and position on the title page.  In fact, the positioning of the diamond on the title page was one of the clues that helped me identify a stolen first edition Book of Mormon title page two years ago. http://blogs.dallasobserver.com/unfairpark/2012/06/dallas_book_dealer_cracks_case.php