Mexico
Puebla. Uniface copper 10 Centavos 1915 MS62 NGC, KM-TS1, GB-401. Well struck for the issue, with blank obverse and plain edge. This issue is unknown as a normal strike and only a few pieces (perhaps 3-5) are known of the uniface trial strikes. Very rare and the first we have seen.
Estimate: 1200-1500 USD