Argentina (Buenos Aires)
Buenos Aires, Argentina, copper 5/10 real, 1827, struck over a 1 decimo of 1822, NGC MS 64 RB, ex-O'Brien.KM-3.Sharply struck with some host coin details still showing, plenty of bright original copper-red color.Pedigreed to the John O'Brien collection (stated on label).
Estimate: 100-150 USD