1779 NGC AU 53 Bolivia 8 Reales Charles III Spain Colonial Silver Coin (24112103D)Almost Uncirculated Bolivia Spanish Colonial silver 8 reales coin. Struck for King Charles III at the Potosi Mint (mint mark PTS monogram), assayer PR. Certified by NGC to AU 53. Colorfully toned with abundant luster, very attractive in hand. Type of coinage that circulated as a dollar in the American Colonies and during the American Revolution.