Watch List notes:

Potosi, Bolivia, cob 4 reales, 1737M/E, extremely rare, ex-Trastamara. 13.07 grams. Nice full pillars with very bold full date, off-center cross with second date below, three assayers but just the one to right of cross with M/E (first we have seen), toned AVF. Pedigreed to the Isabel de Trastamara collection (Aureo & Calico auction of May 2014, with original lot-tag #480).

Estimate: $350 - 500