The next level was Silver which included ticket books such as the 10 adventure ticket books. This key was given out to more senior employees as well as to higher level suppliers and friends of Disneyland.
Final one is the Gold Key which was given to dignitaries, movie stars, Governors and even Presidents. The key allowed larger ticket books such as the 15 adventure tikcet books.
All of these folders were purchased years ago when a dealer showed up at one of the NFFC shows and was selling of a collection of tickets used as examples by a long term Main Gate employee.