^Lot 1554 BOLIVIA, Potosí, clump of one cob 4 reales "biscuit" and chunk of coral, Philip IV, assayer not visi

BOLIVIA, Potosí, clump of one cob 4 reales "biscuit" and chunk of coral, Philip IV, assayer not visible. KM-17a; Cal-Type 279. 25.16 grams total. Roughly 1¾" x 1" x 1". Thickly encrusted, featureless coin attached to a chunk of rusty encrustation and coral. With original certificate from Captain Tracy Bowden through his contract with the Dominican Republic. Recovered from: Concepción, sunk in 1641 off Hispaniola