ARGENTINA. Banco de la Provincia de Buenos Aires. 20 Pesos Oro, 1.1.1883. P-S540s. Specimen. PMG Gem Uncirculated 66 EPQ.Specimen serial numbers, overprints and punch cancels. A magnificent ABN design and seen with an attractive brown under-printing. This catalog number is simply rare in any form and this specimen, like the 10 Pesos Oro also offered, is the only note PMG has graded for the catalog number. Well centered, fully original and sharply detailed.PMG Gem Uncirculated 66 EPQ.