MEXICO. International Numismatic Convention 10 Ounce Silver Medal Piefort, 1987-Mo. Mexican (Potosi) Mint. NGC PROOF-67.
cf. KMX-MB49 (5 Ounces). A VERY RARE double sized issue of this already popular sampling of the 1732-Mo F 8 Reales design. A great cameo is on full display, with immense mirroring in the fields and frosted devices.
Estimate: $300 - $500