1870-1905 Weight 33.84 grams; 0.875 fine gold. 1917-1921,1959 Weight 16.6666 grams; 0.9 fine gold. 1980-1984 Coins struck in copper-nickel. 1985-1990 Coins struck in brass. Reverse depicts first president Guadalupe Victoria. 1993-1995 Coins struck in aluminum-bronze ring, 0.925 fine silver center. Currency reform: 1 new peso = 1000 old pesos. 2000-2001 Coins struck in brass ring, copper-nickel center. Change from "np" to just "p" (peso). Reverse depicts Aztec with torch. 2000-2001 Reverse depicts Octavio Paz. Continue to United Mexican States 25 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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