Watch List notes:

Potosi, Bolivia, cob 4 reales, Philip IV, assayer T, quadrants of cross transposed, ex-"Panama Hoard" (ca. 1629), mounted cross-side out in silver bezel with 14K gold prongs and bail. 15.31 grams total. Odd shape, with nearly full cross (mounted upside-down) and most of shield with bold P-dot-T, AXF with flat spots, orange sediment in crevices.
($150-225)