What is a 1975 world series baseball worth unsigned?

Answer 1

Rawlings first started to make World Series baseballs in 1978 that features The World Series logo. Without the logo it would be difficult to prove it was used in the World Series and not just a Official Major League Baseball used during the regular season. To, be valued as a 1975 World Series Baseball would be in the ability to prove so. A "Game used" baseball would have to be accompanied with provenance, and the quality of the provenance will dictate the added value. A letter from a player, team, or League official would be acceptable. A letter from a fan at the game would not hold much weight if any. Without provenance the added value will rely on the buyers belief in the story.