Watch List notes:

Potosi, Bolivia, cob 8 reales, 1652 E, with crowned-F (Mastalir Fa1) countermark on shield, very rare, Mastalir Plate. S-P36; KM-19b; Cal-1492. 26.90 grams. Solid and choice piece with very bold full countermark near center of full shield with clear P-E to left, full but weaker cross with full date showing the 2 over the 5 due to doubling, a very rare date for the shield type with only 25 examples known in all subtypes, nicely toned with one tiny edge-split. Pedigreed to the Roberto Mastalir Collection of Countermarked Potosi Cobs, Plate Coin (page 153 in Part A and page 327 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
($500-750)