Casey Stengel was like a father to Mickey Mantle, and a signed Baseball of Mickey, and his first Manager would be desired. A Casey Stengel Mickey Mantle signed baseball would be worth about $300.-$500. Price will vary based on condition, and the type of authenticity that accompanies the signature. Multi signed Items typically sell for less than single signed items by a noted player.
The pictures of Mickey, and Casey signing the baseball would be very collectible and could be valued between $20.-$50.each. The pictures as being used to authenticate the signatures will help but might not be acceptable to get full value. Signatures that have not been properly authenticated could sell at half the market value or less.
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