Watch List notes:

Potosi, Bolivia, cob 8 reales, 1738 M. S-P47; KM-31a; Cal-1576. 21.20 grams. Well-centered pillars side with bold date and assayer, slightly off-center and heavily pitted cross with bold second date below, typically chunky with small edge-splits. With certificate and tag. From: Princess Louisa, sunk in 1743 off the Cape Verde Islands, west of Africa
($150-225)