1829-Pi PCGS AU 58 Mexico 8 Reales Potosi Mint Rare Silver Coin POP 1/0 (20022305C)Rare Almost Uncirculated Potosi Mint (Pi) silver 8 reales coin. Certified by PCGS to AU 58, Population Census: This coin, none higher. Considerable underlying luster, especially lustrous in the peripheral legend areas (difficult to capture in the scan). DP Pi04: "This coin is the second scarcest of the 1828 1841 period. This date normally comes Fine to Very Fine. Extremely Fine examples appear occasionally, but they are scarce. Anything better is rare.