Billy Joe Dupree Autographed Dallas Cowboys 1982 Schedule Card PSA Slab 32633 The number in the listing title is just an inventory sku for our records and is not the authentication number. This is a Dallas Cowboys 1982 schedule card that was personally autographed by Billy Joe Dupree. This has been slabbed by Professional Sports Authentication (PSA) and includes a certificate of authenticity from Denver Autographs.