Watch List notes:

Mexico City, Mexico, cob 8 reales, 1681 L. S-M21; KM-46; Cal-642. 20.51 grams. Bold full date and full oML, typically mostly flat and thin from corrosion, silvery, rectangular flan. With generic (small) certificate from the salvors.Recovered from: Joanna, sunk in 1682 off South Africa.

Estimate: $200 - $300