Potosi, Bolivia, cob 8 reales, 1678E, unique error with assayer on both sides of cross. S-P37b; KM-unl.; CT-unl. 19.52 grams. Full pillars and cross despite moderate corrosion, clear assayer E on both sides of cross, toned around details. Recovered from: Consolacion, sunk in 1681 off Isla Santa Clara, Ecuador
Estimate: $250