Ok, so I have a 1928 $2 bill. Its serial number is E24271626A in red ink; with signatures Synder as Secretary of the Treasury and Clarke as the Treasurer of the United States; as far as I can tell it is worn with several folds and maybe two tiny tears. Also, I don't know if it means anything, but there's also an L in the upper left corner and L511 in the bottom right. Any info would help a lot. Thanks!