Watch List notes:

Potosi, Bolivia, cob 8 reales, 1650 O, with crowned-backwards L (Mastalir L2cc) countermark on cross, rare, Mastalir Plate. S-P35; KM-19b; Cal-1488. 16.59 grams. Nice full shield with P-O to left and 8-O to right plus nearly full crown above, bold full cross with countermark in center (the L angled and somewhat indistinct but attributed by Mastalir to the backwards variety), 50 of date more or less visible, overall very thin from corrosion, lightly toned. Pedigreed to the Roberto Mastalir Collection of Countermarked Potosi Cobs, Plate Coin (page 169 in Part B) in his book The Great Transition at the Potosi Mint, 1649-1653, The 1649-1652 Crowned Shield Coinage and the Countermarks of 1652 (2021), with original Herman Moro certificate. From: Capitana, sunk in 1654 off Chanduy, Ecuador
($200-300)