Portugal
Carlos I copper-nickel Proof Pattern 10 Reis 1892 PR66 NGC, Lisbon mint, KM-Pn187, Gomes-E2.02. Plain Edge. A charming off-metal proof of the circulating issue, carefully produced and remaining is essentially as-made condition, with watery reflectivity in the fields and considerable frost on Carlos' portrait. Significant die rotation is noted on the reverse. Undoubtedly rare, as this is the first we have seen.
Estimate: 1000-1200 USD