1863-O AE NGC AU 50 Mexico 8 Reales Oaxaca Mint Scarce Silver Coin (23021301C)Almost Uncirculated Mexico silver 8 reales coin. Struck at the Oaxaca mint (O mint mark, assayer AE). Certified by NGC to AU 50. Old NGC holder (upgrade candidate?). Dunigan Oa12: "This date is was once considered the most common date of the 1860's, but is now probably second behind the 1864 and perhaps tied with the O 1863 FR."