Specifications
| Size | Fine Metal Content | Diameter | Weight | Fineness |
| .4823 troy ounces | 27.43mm | 41.666gm | .900 or 21.6kt |
The gold pesos are struck by the oldest mint in North America, the Mexico City Mint. The 20 pesos were minted from 1917-21 and again in 1959 and from 1960-1971. The obverse shows the Mexican Coat of Arms, depicting an eagle perched on a cactus with a serpent in its beak. The reverse displays the ancient Aztec sun calendar, Cuauhxicalli.