I found this over at Robert Edward Auctions. They described it as an "Extremely rare fold-over program from the 1887 World Series between the American Association Champion St. Louis Browns and the National League Champion Detroit Wolverines. One of only five or six examples known to exist, this is one of the rarest and most significant programs of the 1880s, and also one of the premier display pieces of the nineteenth century. The program features sepia-toned woodcut portraits of the Browns on the front cover and the Wolverines on the back cover."
The program sold for $7,637.50.