Great question, Gary, and one I'm sure that can/will be debated to no end.
That being said, the items that always come to mind for me are the uniform buttons from the original Kinckerbocker Base Ball Club uniform of Lucius "Doc" Adams...the true father of baseball.
These spectacular items are still, thankfully, in the possession of the Adams family and I know that their caretaker couldn't be more protective of them or aware of their historical value.
So, my nod my go to these priceless buttons...the only surviving pieces of uniform from the original Knickerbocker Base Ball Club.
They can be seen here...
http://docadamsbaseball.org/photo-ga...iform-buttons/
Jonathan
www.dugouttreasures.com