Argentina
Buenos Aires. Provincial copper Proof Pattern Decimo 1822 MS64 Brown NGC, Buenos Aires mint, KM-Pn1. This pattern has a superb strike with glass-like fields and gorgeous eye-appeal. Seemingly a bit conservatively graded with a "MS" designation that while consistent with the way NGC currently certify patterns, would be more accurately assigned a "PF" or "PR" grade for its Proof characteristics.
Estimate: 700-900 USD