Depicts the seal of the United Mexican States.

The Seal of the United Mexican States is a modified version of the national coat of arms, with the addition of the full official name of the country Estados Unidos Mexicanos, in a semi-circular accommodation in the upper part of the seal. Current and past Mexican peso coinage have had the seal engraved on the obverse of all denominations.

The coat of arms depicts a Mexican golden eagle perched on a prickly pear cactus devouring a rattlesnake. To the people of Tenochtitlan this would have strong religious connotations, but to the Europeans, it would come to symbolize the triumph of good over evil (with the snake sometimes representative of the serpent in the Garden of Eden).

Depicts the distinctive bracelet of the DN-III-E Plan, with the inscription "50 YEARS PLAN DN-III-E" and symbols representing the Mexican Army and Air Force. The year 1966 appears to the left of the bracelet, and 2016 to the right. Surrounding the bracelet, the text "SECRETARY OF NATIONAL DEFENSE" is at the top, and "MEXICAN ARMY AND AIR FORCE" at the bottom, all framed by a stylized cord. In the exergue, the denomination "$20" is shown, with the mint mark "M°" on the right and "TWENTY PESOS" at the top.

"Plan DN-III-E" stands for "Third Plan for Natural Disaster Emergencies," which translates to "Emergencies for Natural Disasters 3rd Plan."