1790 2 Reales Silver Coin from Mexico, Bust of Carolus IIII, the initials “JHB†are impressed on portrait, on obverse crowned shield between two pillars, “M†with a small “o†above it is the mint mark indicating the coin was made in Mexico City and “F.M.†are the initials of the engravers, unusual for "Carolus IIII†to be spelled out with four Roman numeral ones (IIII), normally that would be “Carolus IVâ€, with small hole for pendant