Impossible odds? I have 2 Federal Reserve One dollar notes, both with Serial Number C40901138A. One is series 1993 other is 2009. Both have been certified by PMG. The 1993 was undoubtably saved because it is a Web printed note. Now comes the series 2009. Approxiomately 9 billion were printed, but only one could have the same serial number (letters and numbers). This is not a fancy number; no reason for it to have been saved from new. Both notes have significant wear; 1993 is graded 35, 2009 graded 30 indicating they were not saved from new, but rather pulled from circulation. How did they get matched up? I have researched through 2 previous owners, but no one knows. I acquired them through an e-Bay auction.