1974 MEXICO 20 CENTAVOS COIN Obverse: "Estados Unidos Mexicanos" in a semicircle over the Mexican coat of arms: a Mexican golden eagle standing on a prickly pear cactus devouring a rattlesnake. At the base of the cactus there is a holm oak (encino) branch on one side and a laurel branch on the other. Standard circulation coin 1974-1983 Copper-nickel