Starting around that series, they changed the notes a bit, so now it is confusing on how to identify the Federal Reserve District.
The Federal Reserve District letter is now found in the serial #. It is the second letter.
All but the 1 and 2 dollar notes, follow this new change.
Here are maps about the different federal districts:
http://www.federalreserve.gov/otherfrb.htm
http://www.glotter.com/entry-1844
The BEP lists some info on the notes:
http://www.moneyfactory.gov/small1denom.html
The Federal Reserve District letter is now found in the serial #. It is the second letter.
All but the 1 and 2 dollar notes, follow this new change.
Here are maps about the different federal districts:
http://www.federalreserve.gov/otherfrb.htm
http://www.glotter.com/entry-1844
The BEP lists some info on the notes:
http://www.moneyfactory.gov/small1denom.html























