Not prewar, but I just picked up this full ticket to Bucknell University's dedication ceremony to the Christy Mathewson Memorial Stadium in Lewisburg, PA in 1989.
As you can see, the ticket pictures a great photo of Matty in uniform. Neat!
BTW, the gentleman that sold this to me let me know that he has a few more, and the price was definately right ($12 delivered). If you would like one, please send me an e-mail and I can send you his contact info.