Mexico, Charles IV. Colonial Silver 8 Reales Coin. Spanish Bust Dollar! This currency was legal tender in the USA until 1857! Denomination: 8 Reales Mint Place: Mexico (Mo) Reference: 1807-MoTH, KM-109. Assayer: Tomas Butron Miranda & Henrique Buenaventura Azorin (TH) Weight: 26.86gm Diameter: 40mm Material: Silver Obverse: Laureate, draped, and cuirassed profile bust of Charle ...