1870-1905 Weight 8.46 grams; 0.875 fine gold. 1905-1955 Weight 4.1666 grams; 0.9 fine gold. 1947-1948 Weight 30 grams; 0.9 fine silver. 1950 Weight 27.78 grams; 0.72 fine silver. Marks the opening of the Southern Railroad. 1951-1954 Reverse depicts Miguel Hidalgo y Costilla. 1953 Reverse marks the bicentennial of the birth of Hidalgo. 1955-1957 Weight 18.05 grams; 0.72 fine silver. Diameter: 36 mm. Reverse depicts Miguel Hidalgo y Costilla. 1957 Reverse marks the 100th anniversary of the constitution. 1959 Reverse marks the 100th anniversary of the birth of Carranza. 1971-1978 Coins struck in copper-nickel. Reverse depicts Vicente Guerro. 1980-1985 Reverse depicts Quetzalcoatl. 1985-1988 Coins struck in brass. 1992-1994 Coins struck in stainless steel ring, aluminum-bronze center. Currency reform: 1 new peso = 1000 old pesos. 1997-2003 Change from "np" to just "p" (peso). Continue to United Mexican States Ten Peso Coins. Return to United Mexican States Coins: Type Collecting main page. References: - 1994 Standard Catalog of World Coins, by Chester L. Krause and Clifford Mishler, 1993. - 2006 Standard Catalog of World Coins, by Colin R. Bruce II, 2005.

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