extremely rare, hitherto unknown, (see introduction for note on general condition of this consignment) " /> Medellín, Banco Mercantíl de Medellín, 1-Peso, 187-, bull in field facing left at center (unlisted in Pick), proof, "SPECIMEN" rubber-stamped on lower right signature area, "August 1874" on lower right margin, <I>extremely rare, hitherto unknown, (see introduction for note on general condition of this consignment)</I> | Christie's