hate to tell you this but these notes are copies, not authentic.i have the real ones and the most obvious sign is the real ones are not black and white, and the signatures are the wrong color, the iron in the ink they used in the late 1860's turned them brown, these sigs are still black. just my 2 cents from my experience.
I know, but I just love how they look, and these have been kept for a long time so they look antique...I have copies of my own, just thought I would share them with others! :0) Still pretty neat to have!