Watch List notes:

Potosi, Bolivia, cob 4 reales, 1738 M, NGC MS 62 ("top pop"). S-P47; KM-30a; Cal-1193. 12.96 grams. Completely white with luster and lack of toning (pristine), with full cross and pillars despite its typically chunky flan, three dates and assayers, typical surface roughness on opposing sides, tied with one other for finest in the NGC census.

Estimate: $400 - $600