At one time free parking tickets to Disneyland only meant a savings of small change. Today a free parking ticket is worth the price of a good meal. This first ticket is from 1978 and was mailed to a guest from Disneyland's public relations department. You'll see the letter and parade tickets around Christmas time.
I don't have a date on this one, the "X" in the serial number usually means this is a courtesy ticket. If so, the ticket above really should have an "X" also, one of the many ticket mysteries.