Argentina (Buenos Aires)
Buenos Aires, Argentina, copper 1/4 real, 1827, NGC MS 64 BN, finest known in NGC census, ex-O'Brien.Janson-13; KM-2.Scarce type (single set of dies known), with light rainbow toning over smooth fields with some original luster, choice rims, no wear or marks, in fact the finest at NGC by five grades.Pedigreed to the John O'Brien collection (stated on label).
Estimate: 200-300 USD