The $20 serial number is 87319. $500 serial number is 24551. $100 serial # is 46245. These are in excellent condition, no creases at all. Thanks in advance for the help!

Beware of reproductions of Confederate notes. There is no way to tell you anything for sure w/o a picture. Repros are still being made but should say so on the piece. Very few originals survived in excellent condition but who knows? Try cointalk.com for better advice.