Nashua, New Hampshire. $20 1882 Date Back. Fr. 552. The Second NB. Charter #2240. PMG Very Fine 25.Even circulation and bright paper are displayed by this darkly printed 1882 $20 Date Back. The Second National issued more than $4.2 million in National Currency from its chartering in March of 1875 though the end of the National Currency era in 1935. This is one of just two $20 Date Backs known on the bank and it is a real charmer. Printed signatures of cashier J.M. Blakey and president F.W. Estabrook are seen in the signature panels.