Not an expert by any means but I know that a lot of Dodger team balls from that era were signed by the bat boy. In my research it shows that a give away is the almost always Jackie Robinson, Roy Campanella and Carl Erskine are stacked in that order.
I won't opine on the authenticity of most but I do know Carl Erskine's and unfortunately that is not his in my opinion.
No help or opinion on the Yankees ball. Sorry.
Drew
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Drew
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