Watch List notes:

Potosi, Bolivia, cob 8 reales, Philip IV, assayer Z, with backwards-L countermark on cross, very rare, Mastalir Plate. S-P34; KM-19a. 18.64 grams. Good but off-center full cross with clear and nearly full countermark, full but doubled shield with clear P-Z to left and denomination oo (8) to right, nicely toned but somewhat corroded, two edge-splits. Plate Coin L2ab-a on page 169 of The Great Transition at the Potosi Mint 1649-1652: The 1649-1652 Crowned Shield Coinage and the Countermarks of 1652, Part B (The Countermarks of 1652), by Robert Mastalir (2021). Recovered from: Capitana, sunk in 1654 off Chanduy, Ecuador


Estimate: 400 - 600 USD