1891-Oa NGC MS 62 Mexico 8 Reales Oaxaca Mint Rare Silver Coin (24090703C)Mint State Uncirculated Mexico silver 8 reales coin. Struck at the Oaxaca mint (Oa mint mark, assayer EN). Certified by NGC to MS 62, Population Census: 5 coins, only 2 higher. Toned with some luster, difficult to capture in scan. Rare in Mint State. Dunigan Oa36: Normally seen Very Fine with Almost Uncirculated examples being scarce. Uncirculated specimens are rare.