Potosi, Bolivia, 1 sol-sized silver medal, 1842, Battle of Yngavi, encapsulated NGC MS 66, finest and only specimen in NGC census. Fonrobert-9799; Burnett-23. 20.5mm; 3.30 grams. Obverse with A/AL ILUSTRE VENCEDOR DE YNGAVI and bust of Jose Ballivian; reverse with LOS ASOGUEROS DEL DEPARTAMENTO DE POTOSI 1842 around mountain of Potosi. Toned. NGC certification number 4431156006. ($350-500)