1978, 1979, 1980 Mexico 50 Centavos standard circulation coins. Obverse: The arms of Mexico with the country name above- ESTADOS UNIDOS MEXICANOS Reverse: King Cuauhtemoc facing left, with feather crown, the value around the top half. Monogram "Mo" of teh exico City Mint is the feather crown with the "o' atop of the mintmark and under the bust with 'o' to the right of 'M' next to the date. Mint mark Mo of Mexico City Mint. Composition: Copper-nickel (75% Copper, 25% Nickel) Weight: 6.5 g Diameter: 25 mm Thickness: 1.9 mm Round, Milled. N# 1030 KM # 451 Shipping is $1.95 to anywhere in the USA. International shipping rates apply. Shipping always combined on multiple purchases.