1947 Cleveland Indians Team Signed BaseballA 1947 Cleveland Indians Team Signed Baseball with the key signatures: Boudreau, Feller, Lemon, Mitchell, and Doby is worth about $350. -$450. Value is based on average prices of recently closed auctions. Prices may vary based on condition, and the type of authenticity that accompanies the baseball. Prices may also vary based on the amount of signatures, and key signatures acquired. The more complete the baseball with key signatures the more valuable.