This is a new area of collecting for me.    "Old American Currency"   I don't know much about this subject...but I'm learning.  (Us Numi's are always learning right)    : )    I love the old designs, the amazing artwork, larger size and overall impressive look of our yesteryear currency.  Our money used to be so COOL...What happened?   I just added this Indian Chief to my collection and hope to get it graded soon. I know it's well worn but a nice example of a very popular note. In the future I'd like to add the $10 Buffalo Note, some of the Educational Series and the Black Eagle.   If anyone could recommend a good book on our paper money please let me know.  Thanks!