If memory serves, I remember reading a
Coin World article back then that mentioned the BEP had done this as part of the new currency design for the $5.00 to $100.00 denominations with no changes to the One and Two Dollar FRN's.
The changes included a common Federal Reserve Seal replacing the Branch Seal and placing the 12 individual Federal Reserve Banks letters (A-Boston [#1] to L-San Francisco [#12]) in the serial number prefix, and both the Bank Branch Letter & Number below the upper left serial number.

I'm sure this is correct, then again !?!?!?
BisonMatt beat me to the post, this is what happens when my AAADD kicks in and I pause in the middle of posting to do something else
Edited by Broken-Coin
04/05/2013 12:29 pm