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 Pastor Rouaix Méndez and Constituent Deputies Venustiano Carranza, Francisco J. Múgica, and Heriberto Jara from left to right. Behind them is the original cover of the 1917 Political Constitution of the United Mexican States. To the right of this scene is the mintmark "M°" representing the Mexican Mint. Surrounding this central composition are the inscriptions "FEBRUARY 5" and the names of the depicted individuals. Above the group, centered, is the denomination "$20", and in a semicircle below, across two lines, reads "1917-2017, CENTENARY OF THE POLITICAL CONSTITUTION OF THE UNITED MEXICAN STATES."

Pastor Rouaix Méndez (1874–1950) was a Mexican politician and revolutionary known for his agrarian reforms. Under Venustiano Carranza's government, he served as Secretary of Industry and Commerce, and later Agriculture, issuing the pivotal Agrarian Law of 1915. A key figure in drafting Articles 27 and 123 of the 1917 Constitution, he returned to politics as a federal deputy and senator, with his major legacy being the initiation of Agrarian Reform.

José Venustiano Carranza de la Garza (1859–1920) was a key figure in the Mexican Revolution, serving as President of Mexico from 1917 until his assassination in 1920. Before becoming president, he was the de facto head of state as Primer Jefe of the Constitutionalist faction from 1914 to 1917, and had previously been a senator and governor of Coahuila. Carranza played a significant role in drafting the Constitution of 1917 and maintained Mexican neutrality during World War I.

Francisco José Múgica Velázquez (1884–1954) was a prominent Mexican revolutionary, major general, and politician. He played a key role in the Constituent Congress of 1917 that drafted the Mexican Constitution. Known for his radical ideology, Múgica served as governor of Tabasco, Michoacán, and the then-Territory of Baja California Sur and Islas Marías.

General Heriberto Jara Corona (1879–1968) was a notable Mexican revolutionary and politician. Throughout his career, he held several key positions, including Ambassador to Cuba and Governor of both Tabasco and Veracruz. He was also a member of the Institutional Revolutionary Party. In 1916, Jara was elected to Congress and played a significant role in drafting the 1917 Constitution.