^Lot 228 BOLIVIA, Potosí, cob 4 reales, 1651 (modern 5) E, with crowned-PH countermark on shield, ex-Ponte, M

BOLIVIA, Potosí, cob 4 reales, 1651 (modern 5) E, with crowned-PH countermark on shield, ex-Ponte, Mastalir Plate. S-P36; KM-17b; Cal-1108. 12.72 grams. Low contrast due to light corrosion and no toning, the countermark (which warped the flan a bit) nevertheless clear with its distinctive crown (full), bottom half of 51 of date. Pedigreed to the Luis R. Ponte Collection and plated on page 362 of Mastalir's book The Great Transition at the Potosí Mint, 1649-1652: The 1649-1652 Crowned Shield Coinage and the Countermarks of 1652, Part B: The Countermarks of 1652 (2020). Recovered from: Capitana, sunk in 1654 off Chanduy, Ecuador