I have 3 1950 $50 Bills. Two have no letter under the date but one has a B. This one with the B was issued by Federal Reserve Bank of New York.The signatures on it appear to be Priest and Anderson. One of the others was issued by Federal Reserve of Philadelphia, the other Boston.The one from Boston has an A in the sealand the one from Philadelphia hasa C in the seal. Both these are signed by Clark and Snyder. They appear in Great shape but they are circulation but really no great amount of fading-no tears. Only a couple folds. Can someone give me an idea of worth and who cn verify them. I know they are real but I also know money of this series will not pass the pen test so need them verified I guess.