These are $1 FRNs printed for the Philadelphia Fed District. The entire CA block and first run of CB block were printed in Fort Worth. The later part of the CB block and most of the CC Block were printed in Washington DC before going back to the Fort Worth facility for the two runs of the CC and CD blocks. The CC(dc) block of 4 and 2 note sheets are also available direct purchase. Questions or for additional information email email@example.com or call (908) 479-1899.