Potosi, Bolivia, cob 8 reales, (16)52E transitional Type III, rare, ex-Mastalir collection. S-P37; KM-A20.3; CT-unl. 10.84 grams. Thin from heavy corrosion (and edge loss) but with full pillars-and-waves showing F-8-IIII and E-•-E for the Type, also 52 of date visible in legend, the shield side bold with clear second date and denomination and faint but certain O/N at top right, toned on fields. Pedigreed to the Roberto Mastalir collection, #III.a-A.x(1)5 in his book (page 71), with Sedwick certificate. Recovered from: Capitana, sunk in 1654 off Chanduy, Ecuador ($175-250)