ARGENTINA. Estado de Buenos Ayres. 1000 Pesos, 1857. P-S427p. Proof. PMG About Uncirculated 55 Net. Previously Mounted.(BA-79s) Specimen Proof. A nice high denomination, with a mention of being previously mounted which is typical for the type.PMG About Uncirculated 55 Net. Previously Mounted.From the Robert J. Bauman Collection.