Series 1929 National Currency $50 bill. Brown seal and serial numbers. This was issued by the Federal Reserve Bank of New York, New York. This is Reserve Bank letter B. Has the traditional portrait of Grant in front center. Deep, rich green color on back of bill. A type of currency that is seldom seen, since National Currency was soon replaced by the Federal Reserve Notes.ÊThis bill was found in a 1930s metal strong box and came from a family who dealt in the alchol business during that time. This bill is being offered just the way it was discovered.