La Confederacion Argentina. 1 Peso, ND (185x). P-S161s, CA-20s. Specimen. PMG Choice Uncirculated 63.Handwritten notation in the upper margin indicates that it was prepared on 8 May 1855 and that this note was from the seventh double plate which is confirmed by the plate number 14 in the upper left corner. It is the only note in the group with the plate number. Previously Mounted.PMG Choice Uncirculated 63.