Watch List notes:

Potosi, Bolivia, cob 4 reales, 1739M, KM Plate Coin. S-P47; KM-30a; CT-1122. 13.69 grams. Chunky as usual, with nearly full cross, one full pillar, two dates and assayers, VF with attractively contrasting toning (probably why it was chosen to be Plate Coin). Plate Coin in Krause-Mishler's Standard Catalog of World Coins (various editions).

Estimate: $175