Favorite baseball ones in my collection:
1) 1913 Chicago Federal League - prior to the league going "pro" in 1914
2) 1916 Cubs - first year at Wrigley. Pass made out to former Cubs owner Charles Murphy. Appears to be in Weeghman's handwriting based on the written "Charles" on the pass and the facsimile "Charles" in facsimile Weeghman signature.
3) 1918 Cubs