At the present time, most one dollar bills in circulation are either 1957's or 1957A's, although a few of the old 1935F's can be found. Last week's discovery was that a new series seems to have ...

A printing error may result in thousands of US citizens sitting on six figures if they have a rare dollar bill.

but there were more than six times as many 1-dollar bills printed. Still, there are some tens that are really rare. They tend to have something special about them. Think really old bills ...