O) 1877 ARGENTINA, DIE PROOF VICENTE LOPEZ SC 38 2c, XF
O) 1903 ARGENTINA , AMBULANTE, LIBERTY HEAD 4 centavos blue, TRANSITO RIO DE JANEIRO, CIRCULATED TO USA, POSTAL STATIONERY
O) 1951 ARGENTINA, ERROR, OFFSET PERFORATION, BULL CATTLE BREEDING, SCT 440 20c blue, MNH