Watch List notes:

Potosi, Bolivia, cob 8 reales, 1651 E, with crowned-F (Mastalir Fa2-x) countermark on cross, rare, Mastalir Plate. S-P36; KM-19b; Cal-1491. 14.77 grams. Choice full cross despite corrosion (thin flan), with full date and clear countermark (normally seen on shield side), full but corroded shield with clear P-E to left, toned all over. Pedigreed to the Roberto Mastalir Collection of Countermarked Potosi Cobs, Plate Coin (page 342 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 photo-certificate. From: Capitana, sunk in 1654 off Chanduy, Ecuador
($250-375)