Potosi, Bolivia, cob 4 reales, 1678 E, retrograde denomination 4. S-P37b; KM-unl (25 for type); Cal-unl (Type 94). 7.88 grams. Oblong flan due to corrosion (thin edge), very bold full pillars and cross, two dates, three mintmarks and assayers, clear retrograde 4, toned in crevices. With original ROBCAR photo-certificate #M003362. From: Consolacion, sunk in 1681 off Santa Clara Island, Ecuador
($200-300)