Almost Uncirculated Mexico silver 8 reales coin.
Struck at the Durango Mint (mint mark Do).
Overdate variety with 1843/31.
NGC certified to AU Details (cleaned), well struck & nicely detailed.
Dunnigan Do20: "This date is very scarce. Normally found Fine to Very Fine, this issue tends to be crude, particularly on the reverse. Extremely Fine examples are occasionally available. A few Almost Uncirculated specimens are known."