This just in, these scans are courtesy of the Gorilla that doesn't blog, thank you Major!!!!
From May 1971, Major's Gray Line ticket book has its Main Gate admission ticket still attached (I think all the ticket books in Majors collection have the admission ticket still attached - wow!) It appears this admission ticket is different than the standard Main Gate ticket of 1971, this one has Tinker Bell - WOW - I've never seen one of these!
Nice LOW serial number, notice the "G" in the sequence, that was also on yesterday's June 1974 ticket book.
Thanks again Major!