I was going through one of my storage bins to get out Easter decorations last month and found a folder full of old Disney tickets, menus and such. One of the things I found was a book of tickets from December 1975 on my first visit. It had one each of A, B, C, and D in it. What was interesting is the cost -- $4.75. It was interesting to see the rides that were there -- no Pirates, among other things. I didn't know whether to be happy I found the old tickets...or upset that I let my parents leave the park with unused D, C and B tickets!