I have a One dollar silver certificate in pretty rough shape it's number on it is E50425300B. It has the funny back on it and I can't make out the signatures of the Treasury of the United States or the Secretary of the Treasury. One looks kind of like N.O.Nood... I'm not really sure. The other one is just lots of squiggles. Any help would be great I'm just wondering what it's worth and should it be saved or sold? Thanks