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davidcyclebackAntique cabinet cards, tintypes, etc can have value even if the player and team is not identified. For most tintypes, the player and team is unknown, and baseball tintypes generally sell for fair dollar.
It would raise the value to find out the player is in a minor league or college uniform, but being unable to id a subject isn't the end of the world. Besides, there's a good chance the subject is wearing a high school jersey.