In addition to a Babe Ruth homerun ball and battered capâ€”purported to be one of three extantâ€”some unusual items were on display for the upcoming sports memorabilia auction at the Javits Center on July 14 and 15, like this 1920′s poster for a minstrel show depicting an all black Harvard and Yale football game. The artist envisioned it as a colorful but unduly violent event, perhaps the graphic nature kept this out of the show catalog? Then there’s the poor Whitey Ford collection, who knew that an expired credit card was collectable? Or a cancelled check? Photographs of the historic remnants after the jump.