Watch List notes:

Potosi, Bolivia, cob 2 reales, 1651 E, rare, ex-Mastalir (Plate Coin). S-P36; KM-14b; Cal-913. 5.66 grams. Broad flan with good full cross (particularly sharp castles) and upper half of shield with choice full crown, all a bit off-center, also with bold full final 1 of date and clear P-E to left, lightly toned XF with edge-split. Note the Mastalir reference for this coin (IIIAx-c) shows the wrong lot number from our Auction 11. Pedigreed to the Robert Mastalir collection, plated on page 256 of his 2021 book The Great Transition at the Potosi Mint 1649-1652 / The 1649-1652 Crowned Shield Coinage and the Countermarks of 1652 / Part A: The 1649-1652 Crowned Shield Coinage, and pedigreed to our Auction 11 (lot 761).
($200-300)