[stoogeco]

I recently sold someone a 1952 American League all games season pass. The ticket was of an umpire, and in perfect condition. It has recently come to my attention that these passes/tickets are worth WAY more than I sold it for. Can anyone please shed some light on these, why they are worth so much, and how PSA can put a game/highlight on these when grading them if there is NO date on them? I am very interested to learn, as I have one of them left and don't want to get taken again. Thank you to all for enlightening me!!

Dave