A c. 1860 Brooklyn Atlantics Baseball Card, passed down in the family of player Archibald McMahon for more than 150 years, will be on the block Thursday, July 30, 2015, as part of Heritage Auctions’ Platinum Night Sports Auction, held in conjunction with the 2015 National Sports Collectors Convention in Chicago. It is expected to bring $50,000+. ‘This is a seminal artifact, not just of baseball, but of American history,’ said Chris Ivy, Director of Sports Auctions at Heritage. ‘It ranks with the most significant mementos of the sport’s infancy ever to surface and is, quite possibly, the only team card on Earth printed before the first drop of blood was spilled in the American Civil War.’ The card is being offered by western Massachusetts resident and New York native Florence Sasso, 75, the great grand-niece-in-law of Archibald McMahon, one of the players on The Brooklyn Atlantics. The card, which was given to Sasso by her mother, the lat

Read More: Pre-Civil War baseball card, passed down in one family for 155 years, is ready for auction