ARGENTINA. Banco Argentino. 1/2 Real Plata Boliviana, 1870s. P-S1491r. Remainder. PMG Gem Uncirculated 66 EPQ.
A really scarce remainder coveted by Argentinian banknote collectors and extremely difficult to find this nice. At the time of this write-up, it is the sole graded example on PMG's population report and the finest known of the type.
Estimate: $400 - $700