Watch List notes:

Potosi, Bolivia, cob 8 reales, 1653 E, 1-PH-6 at top, P over inverted E to left and E over inverted P to right of cross, very rare, ex-McClung, ex-Mastalir. S-P37a; KM-21; Cal-1502. 27.38 grams. Very solid and corrosion-free (also nicely toned), with full but very slightly doubled pillars-and-waves and cross-lions-castles, very bold (1)-PH-6 at top (a scarce variety in itself), clear over-punched mintmark and assayer flanking cross, both crowns choice. Pedigreed to the Rob McClung collection (Sedwick Auction 17, lot 415) and the Roberto Mastalir collection. From: Capitana, sunk in 1654 off Chanduy, Ecuador
($400-600)