Potosi, Bolivia, 1 sol-sized silver medal, 1851, Constitutional Oath, encapsulated NGC MS 63, finest and only specimen in NGC census. Fonrobert-9558; Burnett-37. 21mm; 2.3 grams. Obverse with Constitution inside legend JURADA EN 28 DE OCTUBRE DE 1851; reverse with Potosi scene inside REPUBLICA BOLIVIANA. Toned and choice. NGC certification number 4431156010. ($200-300)