| Obverse description | `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. |
| Obverse script | Latin |
| Obverse lettering | ESTADOS UNIDOS MEXICANOS |
| Reverse description | Portrait of Francisco Indalecio Madero facing front-right. Year and mintmark on the left, value on the right. |
| Reverse script | Latin |
| Reverse lettering | Mo 1981 20c. |
| Edge | |
| Mint | (Mº) Mexican Mint (Casa de Moneda de México), Mexico, Mexico (1535-date) |
| Mintage | 1981 Mº - Proof - |
| Catalog ID | 6291800720 |
| Comments |