Watch List notes:

Potosi, Bolivia, cob 8 reales, (1650-2) O or E, with uncommon crown-alone (Mastalir K4o1) countermark on cross, unique, Mastalir plate. KM-19b. 12.76 grams. A fragmentary coin but with nearly full and clear countermark on cross side, in fact the only coin known with this sub-variety on that side, most of shield visible, darkly toned all over. Pedigreed to the Roberto Mastalir Collection of Countermarked Potosi Cobs, Plate Coin (page 271 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 copy of Herman Moro certificate. From: Capitana, sunk in 1654 off Chanduy, Ecuador
($150-225)