1851/0-Go NGC AU 58 Mexico 8 Reales Guanajuato Very Rare Silver Coin POP 1/1 (22080903C)Almost Uncirculated Mexico 8 reales silver coin. Very Rare overdate variety (1851 0) minted at Guanajuato Mint (mint mark Go), Assayer PF. Certified by NGC to AU 58, Population Census: This coin, only 1 higher (MS61). Lightly toned with lustrous and reflective surfaces. Dunigan Go35, "The normal date is common while the overdate is very rare. Normally this year comes about Very Fine. Extremely FIne examples do turn up, but Uncirculated specimens are